KEEP ISRM FREE!
Donations are
tax deductable

Albert Nestler AG, a German firm located in Lahr, Germany and founded by Albert Nestler. His great grandson, Jürgen Nestler, in Hausach, Germany, is a major contributor to this gallery with many donations of slide rules from when the slide rule factory stopped production in 1978, exactly 100 years after its conception. In 1878 Albert Nestler made his own dividing engine for placing scales on stocks purchased from Dennert & Pape. By 1905 his company manufactured their own stock bodies as well. Prior to WWII, Nestler was shipping slide rules to 60 countries - see Nestler Country Family Tree.
Additional pictures of the Nestler factory and modern German exhibits are displayed at the end of this gallery page and on the Historical Photos,People with Slide Rules gallery.

1901 Signature. Albert Nestler (1877-1961) in portrait shown leaning on Dividing Engine. It resides in the Technoseum in Germany and was used up until the end of production.

Albert Nestler Facilities 1878, 1911, 1921 and 1937

Nestler Factory in Lahr, Germany 1956, rebuilt post WWII.

Note: In 1901-1902 only Albert's Initials were on the slide rule. In 1955, 2-digit model numbers were replaced with 4-digit numbers and only 'NESTLER' is used, in place of Albert Nestler AG, in the branding of slide rules.

Albert Nestler A.N. (Initials, no logo) 1901-1902 20 inch Mannheim
REF

Albert Nestler A.N. (Initials, no logo) 1901-1902 20 inch Mannheim
Made in Germany.
Front Scale (extended): 20in // A [ B, C ] D || 52cm
Back Slide: [S, T ] (Note: Upside down "T")
Well: 52cm-103cm
Back: Equivalents label in German. Damaged and unredable. See 10inch A.N. version below.
Scan by Andreas Fassbender, Germany

Albert Nestler No24 Rietz 50cm WWII Germany Army
ISRM 14.02.09.01

This is a hard case made of galvanized steel, painted desert tan.

Albert Nestler No24 Rietz 50cm WWII Germany Army
Made in Germany.
Front Scale (extended): 55cm // K, A [ B, CI, C ] D, L || 56.5cm
Back Slide: [ S, S&T, T ]
Back: Equivalents and Abbreviations,in German

Albert Nestler No28a Universal Stadia 400° 50cm. pre1938
ISRM 14.02.28.011

Albert Nestler No28a Universal Stadia 400° 50cm
Note: for topographic and tachymetric calculations, used by surveyors.
Made in Germany - Note: Screws on ends for holding down laminations.
Front Scale: 55cm // L, D [ B, Cos², SinCos, C ] D || K, A
Back Scale: [ S, S&T, T ]
Back: Equivalents and Abbreviations in German
Acquired from Sofia, Bulgaria

Nestler No 0215 Darmstadt 50cm
ISRM 09.04.24.13

Nestler No 0215 Darmstadt 50cm
Made in Germany.
Front Scale (extended): 56cm, L // K, A [ B, CI, C ] D, P || S, T
Back Slide: [ LL1, LL2, LL3 ]
Back: Equivalents and Abbreviations,in French, German and English
Donated by Jürgen Nestler, Hausach, Germany
Jürgen Nestler, born in 1940, is the great grandson of founder of Albert Nestler Co. in Lahr, Germany. Jürgen was a manager in factories providing injection molds as a supplier for the automobile industry and was a member in the german VDI (Verein Deutscher Ingenieure, Society of German Engineers). His apprenticeship was in the Nestler factory and after his education, constructed constructed amny of the machines. A generous benefactor of the Oughtred Society, to which he donated 50 new Nestler slide rules for inclusion at no cost to buyers in the OS Slide Rule Learning Kit. Jürgen contributed the Nestler family portraits shown in this gallery along with other useful information including some personally owned slide rules. He donated a large collection of Nestler slide rules to the State Museum for Technology and Labor in Mannheim, Germany.

Nestler 1.6m Cylindrical Rule (Rechenwalze)
REF

Albert Nestler 1.6m Cylindrical Rule (Rechenwalze)
Made in Germany - circa1930
Scale: C ( D ) = 1.6 meters long
Archive - Ed Chamberlain Collection

Albert Nestler 12.5m Cylindrical Rule (Rechenwalze)
REF

Nestler 12.5m Cylindrical Rule (Rechenwalze)
Made in Germany - circa1930
Scale: C ( D ) = 12.5 meters long
Archive - Ed Chamberlain Collection

Albert Nestler Mannheim with A.N. logo c1901
ISRM 22.02.12.03
Box is marked "Dr, Franz London, Breslau" - Franz London (1863-1917) was a math professor of the University of Bonn, and father of the physicist Fritz Wolfgang London (1900-1954) one of the most distinguished scientists on the Duke University faculty, and was an internationally recognized theorist in Chemistry, Physics and the Philosophy of Science. He was born in Breslau, Germany (written on sleeve) and died in Durham, North Carolina. It's likely that Fritz used his father's slide rule while at the University of Munich (LMU). Fritz London and his younger brother Heinz cracked the decades-long mystery of superconductivity. In his honor, the Fritz London Memorial Prize was created posthumously and has become one of the most important international awards in low-temperature physics. This slide rule was found at the estate sale of Fritz London's son, Frank, in Durham NC, so three generations owned this specimen.More on Fritz London at wikipedia

Albert Nestler Mannheim with A.N. logo c1901-1902
Note: This is the earlist Nestler slide rule in the ISRM archives.
Made in Germany, by Albert Nestler Lahr i/B. Logo at this time was just Albert Nestler's initials.
Note: Stock with 4 slots in well made by D&P, 'Railroad Track' style divisions placed by Nestler.
Patents: DRGM 164885.
Materials: Mahogony stock with laminated with white celluloid.
Front Scale: 25cm // A [ B, C ] D || 27cm
Back Scale: [ S, L, T]
Well: extended linear metric scale, 27cm-53cm
Back: Equivalents (German)

Acquisition was made possible by a gift from Andreas Fassbender of Germany.
Andreas Fassbender is a collector and contributor to ISRM. He is Mechanical engineer currently working in the product management of a grease manufacturer. His passion for collecting slide rules began in 2019 with a No 20 "Kiel" and instructions from Albert Nestler, which he found in his father's estate. He specializes in the models and history of Albert Nestler.

Albert Nestler Mannheim with A.N. logo c1901
REF

Albert Nestler Mannheim with A.N. logo c1901-1902
Made in Germany, by Albert Nestler Lahr i/B. Logo at this time was just Albert Nestler's initials.
Note: Stock with 4 slots in well made by D&P, 'Railroad Track' style divisions placed by Nestler.
Patents: DRGM 164885.
Materials: Mahogony stock with laminated with white celluloid.
Front Scale: 25cm // A [ B, C ] D || 27cm
Back Scale: [ S, L, T]
Well: extended linear metric scale, 27cm-54cm
Back: Equivalents (German)
Archive photos by Andreas Fassbender of Germany.

Nestler's Universalschieber c1904-1905
REF

Nestler's Universalschieber c1904-1905
Made in Germany, by Albert Nestler Lahr i/B, Distributed by Theodr Zlocha, Mechaniker, Wien, Wiedon, Haupstr. 19.
Note: Stock with 4 slots in well made by D&P, 'Railroad Track' style divisions placed by Nestler.
Patents: DRP 173660. Scale based on Max Rietz (1872-1956) Patent 181110 (1902)(
Materials: Mahogony stock with laminated with white celluloid.
Front Scale: 25cm // L, C [ B, Sin-Cos, C ] D, A || K
Back Scale: [ S, ST, T]
Back: Equivalents (German)
Archive - scan by Andreas Fassbender Collection.

Cover of 1905 60-page book (in Italian) by Jü Nestler, of Germany.that lists the Universal instructions inside. This entire book is reprinted in the ISRM Volume 27 Italiano Nestler

Albert Nestler System Rietz Pre-Model 23, c1908-1911
REF

Albert Nestler System Rietz Pre-Model 23, c1908-1911
Made in Germany, by Albert Nestler Lahr i/B. (this logo used from 1908-1911) Note: Stock with 4 slots in well made by D&P, 'Railroad Track' style divisions placed by Nestler.
Patents: DRP 173660. Scale based on Max Rietz (1872-1956) Patent 181110 (1902)(
Materials: Mahogony stock with laminated with white celluloid.
Front Scale: 25cm // K, A [ B, C ] D, L || ??
Back Scale: [ S, T]
Back: Equivalents (German)
Original owner: Gahl, written on back. Family says it was acquired in Germany in 1950. Bought used.
Archive photos by Thomas G.Gahl, son of original owner. Edited by ISRM

Catalog image and historical background provided by Jü Nestler, of Germany.

Nestler Mannheim
ISRM 13.06.20.04

Nestler Mannheim - c1917 (Pickworth Data Slip)
Made in Germany, Stock with slots in well made by D&P, 'Railroad Track' style divisions placed by Nestler.
Front Scale: 10inch // A [ B, C ] D || 27.5cm
Back Scale: [ S, ST, T]
Well Scale: 27.5 to 55 inch depth scale (continuation of metric measure)
Back: English text: Slide Rule Data Slips, Compiled by C.N. Pickworth, Wh. Sc.

Gift of Phillip Rodley of UpperHutt, New Zealand
This slide rule and others in the ISRM archives and galleries were donated through the generosity and support of Phillip Rodley. Phil is very enthusiatic in finding slide rules in New Zealand that are not available to the rest of the world, and gifting them to ISRM. He enjoys the American brands that have leather sleeves and belt loops.

Nestler Mannheim - Magnifying Cursor
ISRM 08.06.28.01
Thomas Boulton (c1885-1947) Used this slide rule while working worked in the UK PORTSMOUTH DOCKYARD and was second in command as a shipwright from 1900 to 1946. Born around 1885? in Portsmouth and joined Portsmouth Dockyard as an apprentice 1903, achieving master shipwright 1917. Continued on right

Nestler Mannheim - c1917 (Pickworth Data Slip)
Made in Germany. Stock with 'springy' now made by Nestler in 1905, along with 'Railroad Track' style divisions.
Front Scale: 25cm // A [ B, C ] D || 10.75in
Back Scale: [ S, ST, T] Slide Rule Data Slips
Well Scale: 10.75 to 21.75 inch depth Scale: Back: English text: Slide Rule Data Slips, Compiled by C.N. Pickworth, Wh. Sc.
Donated by Marsha Boulton, UK. great grand daughter of Thomas Boulton

Cont'dDuring this time he undertook refurbishment of HMS Victory (Nelsons flagship and still the oldest commissioned warship in the World) and the Royal Yacht Britannia. Promoted to second in command in the historic Portsmouth dockyard and before WWII was designing and building warships including HMS Amphion in 1935. This was sold to the Aussies and sunk by the Japanese in 1942 having been renamed Canberra. Died in 1947 Marsha has two letters from the Admiralty, from 1944, thanking Thomas Boulton for his zeal in the war effort and commiserations to her great gran, the widow on his death.

Nestler Mannheim c1920
ISRM 12.10.01.01

Nestler Mannheim (early - note screws on ends)
Made in Germany - c1920's - May have been for a US brand
Front Scale: 10in // A [ B, C ] D || 25cm
Back Scale: [ sin, L, tg ]
Multilined cursor
Back: Equivalents (in English)

Albert Nestler System Rietz (1925)
ISRM 21.12.18.01

Albert Nestler System Rietz (1925)
Made in Germany, by Albert Nestler Lahr i/B.
Note: Stock with 4 slots in well. stock made by D&P, Conventional style divisions placed by Nestler.
Patents: D.R.P. 173660, 18110.
Materials: Mahogony stock with laminated with white celluloid.
Front Scale: 25cm // K, A [ B, C ] D, L || 1:25 scale
Back Scale: [ S, T]
Back: Equivalents label missing

Nestler Pocket Mannheim c1925
REF

Nestler Pocket Mannheim (early - note screws on ends)
Made in Germany - c1925's
Front Scale: 10cm // A [ B, C ] D || ??
Back Scale: [ sin, L, tg ]
Multilined cursor
Well Markings: Gefertigt von Albert Nestler A.-G. Lahr, Baden. für Robert Bosch A.-G. Stuttgart.
Back: Label Missing
Archive - Photo by Jacek Szukowski Collection, Poland
Note: Robert Bosch, (1861-1942) was a German engineer and industrialist who was responsible for the invention of the spark plug and magneto for automobiles and whose firm produced a wide range of precision machines and electrical equipment in plants throughout the world. He was trained in the United States and worked with Thomas Edison.

Albert Nestler Early 12.5 Mannheim
REF

Albert Nestler Early 12.5 Mannheim
Made in Germany - c1902
Front Scale: 12.5cm // A [ B, C ] D || 13.5cm
Back Scale: [ sin, L, tg ]
Well Markings: 13.5cm - 26cm
Back: Material properties (English)
Archive - Scan Of Andreas Fassbender Collectio

Nestler Rietz c1920
ISRM 12.06.25.01

Nestler Rietz (early - note screws on ends)
Made in Germany - c1920's - May have been an OEM model for a US brand. The scale configuration is common to K&E, Deitzgen, Lawrence, etc.
Front Scale: 10in // A [ B, CI, C ] D, K || 25cm
Back Scale: [ S, L, T ]
Multilined cursor
Back: Equivalents (in English)

Nestler Nr.2 Mannhiem with Trig (A. Lietz ALCO 2976) c1928
ISRM 22.02.17.01

Nestler Nr.2 Mannhiem with Trig (A. Lietz ALCO 2976) c1928
Made in Germany by Albert Nestler.
Note: Painted scales on wood with thin-film Celluiloid cursor
Front Scale: A [ B, C ] D, K
Back Scale: [ S, L, T ]
Original Owner: Morris E. Bergstrom of Los Angeles, California.
Gift of Rand Huggett Family, of Sutter Creek, California.
See the complete Biography at the A. Lietz Co. section of the United States Gallery

Nestler Nr.2 Mannhiem with Trig c1928
ISRM 22.07.06.12

Nestler Nr.2 Mannhiem with Trig c1928
Made in Germany by Albert Nestler.
Note: Painted scales on wood with thin-film Celluiloid cursor
Front Scale: A [ B, C ] D, K
Back Scale: [ S, L, T ]
Back: U.S Circular No. 47 Equivalents.
Gift of Cindy Tate of Bozeman, Montana.

Nestler No.2 (Feinmessinstitut Joe Klawun No.11) Mannheim
ISRM 13.09.16.03

Nestler No.2 (Feinmessinstitut Joe Klawun No.11) Mannheim
Made in Germany by Albert Nestler, Additional branding for Feinmessinstitut Joe Klawun, Berlin-Charlottenburg 5
Note: This Nestler labeled Nr.2 has laminated celluloid engine-divided scales
Front Scale: A [ B, C ] D
Back Slide: [ S, Lg, T ]
Cursor: Missing, see Nestler No. 9 for proper cursor.
Back: Blank

Nestler No.4 Student w/Trig 1938
ISRM 21.02.10.02

Nestler No.4 Student w/Trig 1938
Made in Germany by Albert Nestler,
Front Scale: A [ B, C ] D
Back Slide: [ S, L, T ]
Back: Blank

Albert Nestler A-G No.7 Commercial School c1933
REF

Albert Nestler A-G No.7 Commercial School c1933
Made in Germany - Nestlers kaufmännischer Schulrechenschieber
Front Scale: q%, Z [ T, M, D% ] K, L
Back: [ blank ]
Gauge marks: mk, yd, cwt, lbs, feet, inch, mkg
Original owner: Heinz Hobelt (written on back)
Archive - Scan By Andreas Fassbender Collection

Albert Nestler A-G No.8 System Rietz
ISRM 21.03.23.01

Albert Nestler A-G No.8 System Rietz
Made in Germany
Front Scale: A [ B, C ] D
Back Slider [ blank ]
Multilined cursor

Albert Nestler No.9
REF S477

Albert Nestler No.9
Made in Germany
Front Scale: K, A [ B, C ] D, L
Back Scale: 29.3cm [ S, L, T ] 11-5/8in
Multilined cursor

Albert Nestler No.10 1938-1940
ISRM 13.00.00.78

Albert Nestler No.10 1938-1940.
Made in Germany, RailRoad Track scales.
Note: This has the short label which was used after 1938, but the aluminum framed cursor was used up to 1940.
Front Scale: 27cm // K, A [ B, C ] D || 29.5
Back Scale: [ S, L, T ]
Back: Equivalents in German.
Aluminum framed cursor (replaced lens)

Albert Nestler No.10 1925-1938.
ISRM 22.03.01.29

Albert Nestler No.10 1925-1938.
Note: This has the long label which was used between 1906-1938. The cursor was used between 1925-1945
Made in Germany, All glass cursor
Front Scale: 10in // K, A [ B, C ] D || 25cm
Back Scale: [ S, L, T ]
Back: Equivalents in English.
Gift of Philip E. Stanley Collection

Nestler 11-R Rietz 13cm c1950
ISRM 20.04.10.65

Nestler 11-R Rietz 13cm c1950
Made in Germany - 11 scales
Front Scale: 13cm // K, A [ B, CI, C ] D, L
Back Scale: [ S, S&T, T ]
3 lined metal framed cursor
Adv on back: SULZER.- on sleeve: IPC
Gift of Philip E. Stanley Collection

Nestler 11-ZE Electro
REF P044

Nestler 11-ZE - Electro Closed Simplex
Made in Germany - 10 scales
Front Scale: 13cm // .1-.7 Cos, KW(A) [ PS(B), CI, C ] D, .7-.995 Cos
Back Scale: [ S, ref, T ]
3 lined cursor
Adv on Case: A.E.G.

Nestler 11-ZM Trig
REF P021

Nestler 11-ZM Trig
Made in Germany
Front Scale: 13cm // A [ B, C ] D
Back Scale: [ S, L, T ]
Multilined cursor
Back Adv: Ewald Friederichs.

Nestler 11-ZM Trig
ISRM 21.02.16.02

Nestler 11-ZM Trig
Made in Germany - Folded sheet Plastic cursor lens.
Front Scale (Extended)
13cm // A [ B, C ] D
Back Scale: [ S, L, T ]
Back/Well promo: Krupp Stahlspunddwand. Fried. Krupp A.G., Friedrich-Alfred-Hütte, Rheinhaussen

Nestler 11-ZR Rietz
ISRM 21.02.16.02

Nestler 11-ZR Rietz
Made in Germany - Sheet Metal cursor blocks and riveted plastic lens.
Front Scale (Extended)
13cm // K, A [ B, CI, C ] D, L
Back Scale: [ S, S&T, T ]
Multilined cursor

Nestler (No Model No) - Electro Scale
ISRM 20.04.10.383

Nestler (No Model No) - Electro Scale
Made in Germany - 6 scales
Front Scale: 13cm // A [ B, 0-200 Motor scale), C ] D
Back Scale: [ blank ]
3 lined cursor (borrowed from model No.0115).
Gift Of Philip E. Stanley collection

Nestler 0115 Techniker
ISRM 12.11.22.06

Nestler 0115 Techniker
Made in Germany - Older model with closed trig scale windows.
Front Scale: 13cm // A [ B, C ] D
Back Scale: [ S, ST, T ]
Multilined cursor
Donated from the collection of Robert L. Allison of Ballard, Washington.

Nestler 0115 Techniker
ISRM 20.04.10.422

Nestler 0115 Techniker
Made in Germany - Newer model with open trig scale windows. Modern logo.
Front Scale: 13cm // A [ B, C ] D
Back Scale: [ S, ST, T ]
Multilined cursor
Gift Of Philip E. Stanley Collection.

Albert Nestler Nr.12 Pocket Mannheim c1915
ISRM 20.03.01.59

Albert Nestler Nr.12a Pocket Mannheim c1915
Made in Germany - Note screws on face and back of stock.
Front Scale: A [ B, C ] D
Back Scale: 14cm [ S, L, T ] 5in
Gif tOf Philip E. Stanley

Albert Nestler Nr.12a 5in Pocket Mannheim c1915
ISRM 20.04.10.412

Albert Nestler Nr.12a 5in Pocket Mannheim c1915
Made in Germany - Note no screws on ends.
Front Scale: 12.5cm // A [ B, C ] D || 14.5cm
Back Scale: [ S, L, T ]
Back: Unrecognixable writing.
Gif tOf Philip E. Stanley

Albert Nestler Nr.12a 5in Pocket Mannheim c1920
ISRM 14.02.14.02

Albert Nestler Nr.12a 5in Pocket Mannheim c1920
Made in Germany - Note screws on ends to secure the laminations.
Front Scale: 13cm // A [ B, C ] D || 14.5cm
Back Scale: [ sin, L, tg ]
Well Markings: Seimens-Schuckert.
Back: Equivalents in German language.

Albert Nestler No.12b 5in w/ Magnifying lens, c1924
ISRM 14.02.22.01

Albert Nestler No.12b 5in w/ Magnifying lens, Pocket Mannheim
Made in Germany - c1924
Note: on equivalents the conversion for Nautical mile = 1851.1 meters. After 1932 the conversion was 1852 meters.
Front Scale: 13cm // A [ B, C ] D || 14.5cm
Back Scale: [ sin, L, tg ]
Well: 28cm
Back: Equivalents in German language.
Note: When this was received the magnifying element was loose and not positioned over the hairline. It was attached using a UV cure glass adhesive, Pacer Technology Super Glue brand. Leave it in the sun to cure.

Albert Nestler Nr.12b Mannheim w/Magnifying lens c1932
ISRM 22.03.01.58

Albert Nestler Nr.12b Mannheim w/Magnifying lens c1932
Made in Germany - Note screws on face and back of stock.
Note: on equivalents the conversion for Nautical mile = 1852 meters.Before 1932 the conversion was 1851.1 meters.
Front Scale: 13.5cm // A [ B, C ] D || 15cm
Back Scale: 14cm [ S, L, T ] 5in
Well: Blank except for model and manufacturer.
Back: Equivalents label Gift of Philip E. Stanley

Albert Nestler No.12c 15cm c1940
REF

Albert Nestler No.12c 15cm, Pocket Mannheim
Made in Germany - c1940
Front Scale: 15cm // A [ B, C ] D || 16.5cm
Back Scale: [ S, L, T ]
Well: 16.5 to 35cm
Back: no label.
Archive - Scan By Andreas Fassbender Collection

Nestler 0121 Darmstadt
ISRM 09.01.12.115

Nestler 0121 Darmstadt
Made in Germany
Front Scale: 13cm // P, K, A [ B, CI, C ] D, Sin Cos, Tan Cot
Back Scale: [ LL1, LL2, LL3 ]
Multilined cursor
Donated by David Hecht, Alexandria, VA

Nestler 0121 Darmstadt
ISRM 20.04.10.92

Nestler 0121 Darmstadt
Made in Germany - Modern Nestler logo, blue slide, convex lens.
Front Scale: 13cm // P, K, A [ B, CI, C ] D, Sin Cos, Tan Cot
Back Scale: [ LL1, LL2, LL3 ]
Multilined cursor
Back adv: Morando Impianti S.p.A - ASTI
Gift Of Philip E. Stanley

Nestler Nr0123 Rietz - Version 1
ISRM 21.11.24.02

Nestler Nr0123 Rietz - Metal Framed Cursor - Version 1
Made in Germany by Nestler. Moder Logo. metal framed cursor.
Front Scale (Extended Scales):: 13cm // K, A [ B, CI, C ] D, L
Back Scale (Open windows): [ S, L, T ]
Gift Of Graham L. Jones of Cambridge, UK
Graham L. Jones studied agricultural sciences and economics at university, followed by 2 years of compulsory National Service in the Army. He was fortunate to be commisioned and after 2 years he transferred to the Army Reserve and served as a troop commander in a volunterr BD Regiment in the Royal Engineers. His career spanned 34 years with the Agricul;tural Development and Advisory Service. Toward the end of his career he was appointed to the British Embassies in Denmark and Norway as First Secretary Agriculture and Fisheries for 4 years. He retired in 1983

Nestler 0123 Rietz - Version 2
REF P050

Nestler 0123 Rietz - Version 2 plastic cursor
Made in Germany - modern Nestler Logo.
Front Scale: 13cm // K, A [ B, CI, C ] D, L
Back Scale (open widows): [ S, ST, T ]
Multilined cursor

Nestler Rietz 0123 Version 3
ISRM 20.04.10.109

Nestler Rietz 0123 (Red Inverse Scales) Version 3
Made in Germany - Modern Logo, green slide. convex lens.
Front Scale: (Extended Scales): 13cm // K, A [ B, CI, C ] D, L
Back Scale (Closed windows): [ S, ST, T ]
Multilined cursor
Gift Of Philip E. Stanley.

Nestler Rietz S
REF P145

Nestler Rietz S - Closed simplex
Made in Germany
Front Scale: 13cm // K, A [ B, CI, C ] D, L
Back Scale: [ S, ST, T ]
Multilined cursor

Nestler Rietz-S
ISRM 09.12.09.01

Nestler Rietz S
Made in Japan by Uchida Yoko Co. for Nestler
Note: Modern Logo, blue slide. convex lens.
Front Scale: 13cm // K, A [ B, CI, C ] D, L
Back Scale: [ S, ST, T ]
Multilined cursor
Donated by Goichi Iida of Uchida Yoko Co., Tokyo, Japan.

Nestler 0129 Polymath Pocket Duplex
ISRM 20.03.01.63

Nestler 0129 Polymath Pocket Duplex
Made in Germany - 22 scales
Front Scale: LL01, LL02, LL03, A [ B, L, K, C ] D, LL3, LL2, LL1
Rear Scale: CT, T, ST, DF [ CF, CIF, CI, C ] D, P, S, CS
Multilined cursor
Gift Of Philip E. Stanley. Worcester, Mass..

Albert Nestler No.13L 8in(20cm) Mannheim
REF

Albert Nestler No.13L 8in(20cm) Mannheim with Magnifying Lens (
Made in Germany Note: 8inch (20cm) slide rule with "Railroad Track" divisions and lamination screws
Model nr.13L denotes "Mannheim mit Lupenläufer". Manufactured between 1912-1934.
Front Scale: 20cm // A [ B, CI, C ] D || 20cm(not verified)
Back Scale: [ S, lg, T ]
Well: Unknown
Back: Equivalents (in French)
Original owner: David Alexander Liddle, father of Janet Scott.
Photo provided by Janet Scott, daughter of David A. Liddle.

David Alexander Liddle, was born in Scotland.(1919-1985). He served as a Desert Rat during WWII in North Africa, Egypt and Italy. After the war he became a coal miner in the Lady Victoria pit in Newtongrange which is now the National Mining Museum in Scotland. When he stopped going down the mine he became a pit prop builder. The slide rule was acquired during his military service, possibly in Casablanca where the allied troops landed. Battle of Casablance.

Nestler 0130 MultiMath Duplex
ISRM 18.04.06.123

Nestler 0130 MultiMath Duplex
Made in Germany - 28 scales
Front Scale: P, S (Sin Cos), T1 ( Tan>45° Cot), T2 ( Tan <45° Cot), A [ B, K, CI, C ] D, R1, R2, L, ST
Rear Scale: LL0, LL01, LL02, LL03, DF [ CF, CIF, CI, C ] D, LL3, LL2, LL1, LL0
Multilined cursor
Gift of Leroy Hausler Collection.

Nestler Nr.11-E Nr.0137 - Electro
ISRM 14.09.21.09

Nestler Nr.11-E Nr.0137- Electro
Note: There are two model numbers on this specimen. The 11E was probably the early number, and the 0137 was the new catalog number.
Made in Germany - 13 scales
Front Scale: 5in // Dynamo/Motor, Volt, KW(A) [ HP(B), CI, C ] D, .7-.995 Cos, .1-.7 Cos
Back Scale: [ S, Lg, T ]
3 lined cursor
Gift of Edward Wright, Odenton, Maryland

Nestler 0140 Commerce 5in
ISRM 20.04.10.346

Nestler 0140 Commerce 5in
Made in Germany - 6 scales
Front Scale: 5in // DF(KZ) [ CF(T), CI(%), C(T), D(Z)
Rear Scale: Blank
Gift of Philip E. Stanley Collection.

Albert Nestler No.14 Modified For Bitumen And Soap Emulsion Proportions
REF

Albert Nestler No.14 Modified For Bitumen And Soap Emulsion Proportions
Made in Germany Note: "Railroad Track" divisions and lamination screws
The owner of this early Nestler slide rule overlayed a paper scale onto the stock to calculating the proportion of Bitumeun and Soap (emulsifier).
Front Scale (Modified): 25cm // % OF BITUMEN (C) [ LBS OR KGS OF BITUMEN (B) ] LBS OR KGS OF BITUMEN AND SOAP SOLUTION(A) || 27.4cm
Back Scale: [ S, lg, T ]
Well: 28-53cm
Back: Equivalents (in German)
Original owner: Unknown
Archive - Scan by Andreas Fassbender Collection.
Note: Bitumen is the oldest known thermoplastic material in use today. Its usefulness and appeal derive from its simple thermoplastic property of being a thin liquid at high temperature and a virtual solid at ambient temperature. The main components of the emulsion are asphalt (bitumen) and water. Emulsions come in different grades but typically contain between 55 and 75% asphalt. In addition to the asphalt and water, asphalt emulsions contain 0.1-2% of an emulsifier or 'soap' which functions to stabilize the emulsion. Bitumens are produced by distillation of crude oil during petroleum refining, and also occur naturally. The major use (about 80%) of bitumens is for road paving; other uses include roofing, waterproofing, sealing and painting. Asphalt Emulsion Manufacturers Association (AEMA)

Albert Nestler No.14/3 Mannheim with Reciprocal Scale
ISRM 14.02.24.01

Albert Nestler No.14/3 Mannheim with Reciprocal Scale
Made in Germany NOte: "Railroad Track" divisions and lamination screws
Front Scale (extended): 27cm // A [ B, CI, C ] D || 27cm
Back Scale: [ S, lg, T ]
Well: 30-56cm
Multilined cursor
Back: Equivalents (in German)
Original owner: E.Schoder, written in case and in well of stock

Nestler 14/52 Micronta
ISRM 09.01.12.15

Nestler 14/52 Micronta
Made in Germany for US Brand Micronta (See Relay/Ricoh gallery)
Front Scale: 10.5in // A [ B, C ] D
Back Scale: [ S, lg, T ]
Multilined cursor
Back: Equivalents (in English)
Donated by David Hecht, Alexandria, Virginia

Albert Nestler No 20 Rietz c1905
ISRM 13.04.12.02

Albert Nestler No 20 Rietz
Made in Germany by Albert Nester - Railroad Track scales
DR Patent: no number stamped in well. In 1906 the German patent 173660 was issued.
Front Scale: 27cm // K, A [ B, C ] D, L || 1:25 6.8m
Back Scale: [ sin, sin/tg, tg ]
Multilined cursor
Back: Equivalents (in German)
Original location: Acquired from Sofia, Bulgaria

Albert Nestler No 20 Rietz 1923
REF

Albert Nestler No 20 Rietz 1923
Made in Germany by Albert Nester - Railroad Track scales
DR Patent: no number stamped in well. In 1906 the German patent 173660 was issued.
Front Scale: 25cm // K, A [ B, C ] D, L || 1:25 6.8m
Back Scale: [ sin, sin/tg, tg ]
Multilined cursor
Back: Equivalents (in German)
Scan contributed by Andreas Faßbender Collection

Nestler Nr.20 "Kiel" - Hermann Schwerdtfeger
REF S326

Nestler Nr.20 "Kiel" - Hermann Schwerdtfeger
Made in Germany - Silver screws on laminations
Front Scale: 27cm // K, A [ B, C ] D, L || 1:25 6.4m
Back Scale: [ sin, sin/tg, tg ]
Multilined cursor
Back: Equivalents (in German)
Hermann Schwerdtfeger was a stationery store from Wesermünde-Geestemünde, located in the vicinity of the Kiel Naval School. Other stationary stores that carried these were Johannes W. Janssen in Kiel-Wik, In addition to Albert Nestler A.G., the company A.W. FABER-CASTELL also supplied a version "Kiel", under the model designation FABER-CASTELL No. 1/94 "Kiel", for the needs of the Kiel Naval School..

Nestler Nr.20/3 "Kiel" Kriegsmarine
REF

Andreas Faßbender (photo above) is a collector and contributor to ISRM. He is Mechanical engineer currently working in the product management of a grease manufacturer. His passion for collecting slide rules began in 2019 with this Nr. 20 "Kiel" and the instructions from Albert Nestler, which he found in his father's estate. He now specializes in the models and history of Albert Nestler.

Nestler Nr.20/3 "Kiel" Kriegsmarine
Made in Germany for the German Navy c1938 - Has Nazi Imperial Insignia
Front Scale: 27cm // K, A [ B, C ] D, L || 1:25 6.8m
Back Scale: [ sin, sin/tg, tg ]
Multilined cursor
Back: Equivalents (in German). A custom data table with, among other things, special information on fuels, fuel oil-fired boilers, as well as electrical lines.
Expanded description of the "Kiel" 20/3 slide rules, its scales and operation.
Scan contributed by Andreas Faßbender, son of the original owner, Jakob Faßbender (in English: Fassbender)
.

Andreas writes: "This slide rule was manufactured according to the specifications of the German Navy for Unteroffizier training at the Naval School in Kiel. The slide rule presented here belonged to my father, Jakob Faßbender, (23.12.1920, to 06.12.2009).. He served in the Kriegsmarine from 01.10.1939 until 08.05.1945. During this time, he underwent several courses at various locations of the Kiel Naval School. His last command took him on 18.11.1944 to the 2nd Submarine Training Division at Gotenhafen. Here he and his comrades were trained for duty on a Type XXI submarine. From my point of view the fate has meant it twice well with him. On the one hand it came for him to no more front deployment. (The submarine weapon was in the Second World War the weapon type with the highest loss rate.). Secondly, he survived the sinking of the Wilhelm Gustloff, but that is another story. The exact history and individual stations of this slide rule I can no longer exactly trace. It can be assumed that the slide rule was produced at the end of the Second World War. A clue to this is provided by the absence of the nickel silver screws at the ends of the scales. A detail I will discuss later. However, the good state of preservation indicates that it must have found its way to the Rhineland, the home of our family, shortly thereafter." This slide rule was manufactured according to the specifications of the German Navy for Unteroffizier training at the Naval School in Kiel. These specimens turn out to be rather rare today.The teaching material for the subject mathematics is described in chapter 3. "The Slide Rule."

Alfred Nestler 2010 Mannheim
ISRM 21.03.19.01

Alfred Nestler 2010 Mannheim
Made in Germany by Alfred Nestler AG
Front Scale: A [ B, C ] D
Back scale: [ S, L, T ]
Note: Glued plastic cursor assembly..

Dieterich-Post Mannheim (Alfred Nestler 2012)
ISRM 13.10.07.09

Dieterich-Post Mannheim (Alfred Nestler 2012)
Made in Germany by Alfred Nestler for Dieterich-Post Co. Los Angeles - San Fransisco - Oakland
Note: Rebranding inside well.
Front Scale: A [ B, C ] D
Back scale: [ S, L, T ]
Note: Thin film plastic cursor. See the Nestler 2012 which has a metal framed cursor.

Nestler 2012 (Metal Frame Cursor)
ISRM 13.10.07.05

Nestler 2012 (Metal Frame Cursor)
Made in Germany - Albert Nestler A.G. Lahr (Baden)
Front Scale: A [ B, C ] D
Back Scale: [ S, L, T ]
Back: US Equivalents (English)
Previous Owner: Cosentio (Name in well of stock)

Albert Nestler No21 Darmstad (c1937)
ISRM 13.04.04.01

Albert Nestler No21 Darmstad (c1937)
Made in Germany by Albert Nester AG. - 1937 German Patent 650658 (cursor)
Front Scale: 27cm, Lg // K, A [ B, CI, C ] D, Sin Cos || Sin Cos, Tan Ctg
Back Scale: [ LL1, LL2, LL3 ]
Multilined cursor, offset center hairline, KW, q, PSd
Back: Equivalents (German)

Albert Nestler 21 Darmstadt
ISRM 11.11.17.01

Albert Nestler 21 - Darmstadt
Made in Germany
Front Scale [extended]
27cm, L // K, A [ B, CI, C ] D, P || Sin Cos, Tan Ctg
Back Scale: [ LL1, LL2, LL3 ]
Multilined cursor, offset center hairline, KW, q, PSd (notice broader lens on edge)
Back: Equivalents (German)(notice differences in back label which includes instructions)

Albert Nestler 21 Darmstadt
ISRM 18.04.06.124

Albert Nestler 21 - Darmstadt
Made in Germany (Post WWII)
Front Scale: 27cm, L // K, A [ B, CI, C ] D, Sin Cos || Sin Cos, Tan Ctg
Back Scale: [ LL1, LL2, LL3 ]
Multilined cursor, offset center hairline, KW, q, PSd
Back: Equivalents (German)
Gift of Leroy Hausler Collection

Albert Nestler 22
REF

Albert Nestler 22 (Pocket version of No.23)
Made in Germany
Front Scale (extended): 16cm // K, A [ B, CI, C ] D, L || 18cm
Back Scale: [ S, S&T, T ]
Well: 18 to 34cm
Multilined cursor with magnifying lens
Back: Equivalents (German)
Scan by Prof Joerne Luetjens Collection, Germany

Albert Nestler 22R System Rietz c1932
ISRM 20.03.01.62

Albert Nestler 22R System Rietz c1932 (Pocket version of No.23)
Made in Germany
Note: Front Scale (extended): 15cm // K, A [ B, CI, C ] D, L || 17.4cm
Back Scale: [ S, S&T, T ]
Well: 18 to 35cm
Multilined cursor
Back: Equivalents (German) Note: 1 Nautical mile=1852 meters (changed from 1851.1 meters in 1932_
Gift Of Philip E. Stanley of Worcester, Mass.

Albert Nestler 23 System Rietz c1908
REF

AlbertNestler 23 System Rietz - Closed simplex
Made in Germany
Front Scale (Railroad Track divisions)
25cm // K, A [ B, C ] D, L || ??
Back Scale: [ S, T ]
2 cursors showncursor
Back: Equivalents (German)
Note: Original owner/user: Gahl, purchased in Germany. Scanned by son, Tom Gahl

1911 Nestler Catalog

Albert Nestler 23R/3 SystemRietz c1930
ISRM 13.00.00.50

AlbertNestler 23R/3 System Rietz - Closed simplex
Made in Germany. Mahagony Stock laminated cellulous.scales. Screws used to prevent shrinkage.
Note all black CI Scale: Front Scale (Extended scales in red)
27cm // K, A [ B, CI, C ] D, L || 1:25
Back Scale: [ S, S&T, T ]
Multilined cursor
Back: Equivalents (German)

Albert Nestler 23RF SystemRietz c1930
REF S420

AlbertNestler 23RF System Rietz - Closed simplex
Made in Germany
Front Scale (note change in extended scales from S250/S565)
Note: L scale marked G+1 and P-1
28cm // K, A [ B, CI, C ] D, L || 1:25 6.5cm
Back Scale: [ S, S&T, T ]
Well: 30-55cm
Multilined cursor
Back: Equivalents (German)

Albert Nestler 23R System Rietz
ISRM 17.05.23.01.X (deaccessioned)

Albert Nestler 23R System Rietz c1906
Made in Germany 1906-1913
Note 1: Railroad track style divisions. Screwed laminations
Note 2: The patent DR 173660 was applied for on 26 April 1905 and granted on 27 July 1906.
Front Scale[extended]: 27cm // K, A [ B, CI, C ] D, L || 1:25 6.5cm
Back Scale: [ S, S&T, T ]
Well: 30-56cm
Multilined cursor
Back: Equivalents (German)

Albert Nestler 23R System Rietz
REF S250

Albert Nestler 23R System Rietz c1908
Made in Germany 1906-1913
Note 1: Railroad track style divisions. Screwed laminations
Note 2: The patent DR 173660 was applied for on 26 April 1905 and granted on 27 July 1906.
Front Scale[extended]: 28cm // K, A [ B, CI, C ] D, L || 1:25 6.5cm
Back Scale: [ S, S&T, T ]
Well: 30-55cm
Multilined cursor
Th. Zlocha, Wien
Back: Equivalents (German)

Albert Nestler 23RF System Rietz
S565

Albert Nestler 23RF System Rietz - Spanish
Made in Germany (Instria Alemana)
Front Scale: 28cm // K, A [ B, CI, C ] D, L || 1:25 6.8cm
Back Scale: [ S, S&T, T ]
Well: 30-56cm
Multilined cursor
multilined cursor
Back: Equivalents (Spanish)
Donated by Bill Demian, Modesto, CA

Albert Nestler 23RF/3 System Rietz
ISRM 09.04.24.01.X

Albert Nestler 23RF/3 System Rietz - Closed simplex
Made in Germany
Front Scale (extended)
27cm // K, A [ B, CI, C ] D, L || 1:5 cm
Back Scale: [ S, S&T, T ]
Multilined cursor
multilined cursor
Back: Equivalents (German)
Donated by Jürgen Nestler, Hausach, Germany

Albert Nestler 23RF/3 System Rietz
ISRM 09.04.24.02

Albert Nestler 23RF/3 SystemRietz - Closed simplex
Made in Germany
Front Scale (extended)
27cm // K, A [ B, CI, C ] D, L || 1:25 cm
Back Scale: [ S, S&T, T ]
Well: 30-55cm
Multilined cursor
Back: Equivalents (German)
Donated by Jürgen Nestler, Hausach, Germany

Albert Nestler 23RF/3 System Rietz
ISRM 20.01.20.02

Albert Nestler 23RF/3 System Rietz - Closed simplex
Made in Germany - RR track divisions
Notice the two triangle logos in the well. the other 23Rs do not have them.
Front Scale (extended)
27cm // K, A [ B, CI, C ] D, L || 1:5 cm
Back Scale: [ S, S&T, T ]
Multilined cursor
Back: Equivalents (German)
Gift of Dr. Michael Sachs of Elkins Park, Pennsylvania.

REF Nestler 0205 Polymath-Duplex Demonstration Rule in Carrying case

Nestler 0205 Polymath-Duplex Demonstration Rule in Carrying case
Made in Germany - 1962-1972
Photo by Jürgen Nestler, Hausach, Germany

Nestler 0210 Darmstadt
ISRM 09.04.24.04

Nestler 0210 Darmstadt - Closed simplex
Made in Germany - date code 275 (Feb 1975)
Front Scale (extended)
27cm, lg(L) // K, A [ B, CI, C ] D, P || S, T
Back Scale: [ LL1, LL2, LL3 ]
Multilined cursor
Back: Equivalents (German)
Donated by Jürgen Nestler, Hausach, Germany

Nestler 0218 Darmstadt
ISRM 09.04.24.05

Nestler 0218 Darmstadt - Closed simplex
Made in Germany - date code 166 (Jan 1966)
Front Scale (extended)
10 in // L, K, A [ B, CI, C ] D, P, S, T
Back Scale: [ LL1, LL2, LL3 ]
Multilined cursor
Back: Equivalents (English)
Donated by Jürgen Nestler, Hausach, Germany

S206 Nestler 0232 Rietz

Nestler 0232 Rietz - Closed simplex
Made in Germany
Front Scale (extended)
27cm // K, A [ B, CI, C ] D, L || 10.5in
Back Scale: [ Sin, SinTan, Tan ]
Multilined cursor
Back: Equivalents (German)

Nestler Nr. 0239 Rietz Green Slide
ISRM 21.03.19.02

Nestler Nr. 0239 Rietz Green Slide
Made in Germany - date code 562 (May 1962)
Front Scale: 10.5in // K, A [ B, CI, C ] D, L
Back Scale: [ Sin, Sin.tan(SRT), Tan]
Back: Equivalents English
Multilined cursor
Belonged to: R.P Crosthwaite (written on box). Lancashire Polytechnic graduated c1968. Research revealed that he was an Astronomer. School of Physics and Astronomy, Preston. Member of the Royal Astronomical Society. He was coauthor of many papers One was the Spectral Shape and Variability of blazar 3C 446 dated 1986 (curator could not find a photo).

Nestler Nr. 0239 Rietz
ISRM 09.04.24.03

Nestler Nr. 0239 Rietz
Made in Germany - date code 68
Front Scale: 27cm // K, A [ B, R(CI), C ] D, L
Back Scale: [ Sin, Sin.tg(SRT), Tg(Tan)]
Back: Equivalents German and English
Multilined cursor
Gift of Colins Barnes, UK

Nestler Nr. 0239 Rietz
ISRM 22.03.01.45

Nestler Nr. 0239 Rietz dc768
Made in Germany - Modern logo, Green slide.
NOte: Stock construction, closed trig windows. Front Scale: 27cm // K, A [ B, CI, C ] D, L
Back Scale: [ S, ST, T]
Back: Blank
Multilined cursor
Gift of Philip E. Stanley Collection

Nestler 0251 Alpha

Nestler 0251 Alpha
Got a scan or one to donate for the archive?

Nestler 0252 Beta
ISRM 09.04.24.03

Nestler 0252 Beta
Made in Germany - date code 1069 (Sep 1969)
Front Scale
K, A [ B, CI, C ] D, L
Back Scale: M(cm), DF [ CF, CIF, CI, C ] D, Z(inch)
Multilined cursor
Donated by Jürgen Nestler, Hausach, Germany

Nestler 0253 Gamma

Nestler 0253 Gamma
Got a scan or one to donate for the archive?

Nestler 0254 Delta LogLog
ISRM 23.01.02.01

Nestler 0254 Delta LogLog
Made in Germany - date code 1167 (Nov 1967)
Front Scale
L, K, A [ B, CI, C ] D, LL3, LL2, LL1
Back Scale: T1 Cot1,, T2 Cot2, DF [ CF, CIF, CI, C ] D, S Cos, ST
Multilined cursor
Gift of Michael Rosenborg of Canyonville, Oregon.
Michael is a retired High School teacher with a Master degree in mathematics. He re-gifted numerous slide rules which he received them fron a USENET group a decade ago, for ISRM's school loaner program.

Nestler 0260 Mechanica (for Machinists)
ISRM 09.04.24.09

Nestler 0260 Mechanica (for Machinists)
Made in Germany - date code 375 (Mar 1975)
Front Scale (extended)
27cm, Rohr (phi)mm // Schnittiefe a, Hobein m/s, (Pattenbr.) D.H./min [ Schnittgeschw.m/min, Vorschub s/U in mm Vorschub s/U in mm, C ] D th in min. || tan, sin
Back Scale: [ Länge, Plattenstärke/in mm, shape mm ]
Multilined cursor
Back: Speeds and feeds (German)
Donated by Jürgen Nestler, Hausach, Germany

Albert Nestler No.27 Präzision (precision), post 1938
REF

Robert Drury writes: "I inherited a slide-rule belonging to my father when he passed away. The cardboard case, which feels quite strong to the touch, was wrapped in black plastic electing tape to protect the case from general ware and tear and has my 1965 address on it.". (continued on right).

Albert Nestler No.27 Präzision (precision), post 1938
From 1938 catalog: "It is important to note that the word 'precision' does not carry the name because it is more accurate than other varieties of slide rules, but it has a great sensitivity through the double divisions. Always traced to 25cm and then again from the left index (25cm) ". What this means that the scales are wrapped to give the equivalent length as a standard 10 inch [25 cm] slide rule.
Made in Germany - 18cm X 3cm X 1cm. Made of Mahagony with celluloid laminations. Screws on ends for holding down laminations.
Front Scale: 6.5in, L(0-5), L(5-10) // C(1-10), B(1-3.3) [ B(1-3.3), CI(10-3.3), CI(3.3-1), B(3.3-10)] B(3.3-10), S || K(1-13.2), K(13-1000
Back Scale: [ S1, S2, S&T, T ]
Cursor: Hairlines extened to tabs on top and bottom edges.
Back: Equivalents in German language.
Archive- Photos by Robert Drury, belonged to his father.

(cont'd from left) " I remember my father give a demo, but I have forgotten all. I can only speculate as to where my father acquired the item, either he picked it up when in Germany/Berlin at the end of WWII. Or my father may have inherited it from his father, who was a draughtsman / surveyor building Airdromes in Kenya and elsewhere under the British Empire. My grandfather was brought up in New Zealand, worked in Kenya, spoke fluent Swahili, fought in West Africa Rifles during WWII."

Albert Nestler No.28 Universal 400° Stadia, post 1938
ISRM 14.02.22.01

Albert Nestler No.28 Universal 400° Stadia, post 1938
Note: for topographic and tachymetric calculations, used by surveyors.
Made in Germany - Note: no screws on ends for holding down laminations.
Front Scale: 27cm // L, D [ B, Cos², SinCos, C ] D || K, A
Back Scale: [ S, S&T, T ]
Well Markings: Seimens-Schuckert.
Back: Equivalents in German language.

Manual PDF Italian, Manual PDF German

Nestler Nr. 29a American-System Log Log Duplex
REF

Nestler Nr. 29a American-System Log Log Duplex- c1950
Made in Germany - 17 scales
Front Scale:
K, DF [ CF, CIF, CI, C ] D, L
Back Scale: LL0, A [B, S, T, C ] LL3, LL2, LL1
archive - Scan donated by Jürgen Nestler, , Hausach, Germany

Nestler 0290 Polymath Duplex - Screwed Cursor Assembly
ISRM 14.03.09.01

Nestler 0290 Polymath Duplex - dc77
Made in Germany, 24 scales Improved Dec Trig Log Log
Front Scale: LL01, LL02, LL03, A [ B, L, K, C ] D, LL3, LL2, LL1
Back Scale: CT, T, ST, DF [ CF, CIF, CI, C ] D, P, S, CS

Nestler 0290 Polymath Duplex - Injection Molded Cursor
ISRM 19.06.21.01

Nestler 0290 Polymath Duplex - dc361 (Mar 1961)
Made in Germany, 22 scales Improved Dec Trig Log Log
Front Scale: LL01, LL02, LL03, A [ B, L, K, C ] D, LL3, LL2, LL1
Back Scale: CT, T, ST, DF [ CF, CIF, CI, C ] D, P, S, CS
Gift of Mike Simmonds of Hertfordshire, UK

Nestler 0291 Polymath Duplex
ISRM 04.11.11.01

Nestler 0291 Polymath Duplex - 1954
Made in Germany, 1954 - 22 scales Improved Dec Trig Log Log
Front Scale: LL01, LL02, LL03, A [ B, L, K, C ] D, LL3, LL2, LL1
Back Scale: CT, T, ST, DF [ CF, CIF, CI, C ] D, P, S, CS
Note: Pickett 140 Cursor. (In ISRM display case)

Manual 2.44MB

Nestler 0292 MultiMath Duplex
ISRM 12.06.24.39

Nestler 0292 Insert (note the small black tool taped to the insert. It is used to take apart the cursor for cleaning.

Nestler 0292 MultiMath Duplex - 1970
Made in Germany - 28 scales - dc 2170
Front Scale: P, S (Sin Cos), T1 (Tan>45° Cot), T2 (Tan<45° Cot), A [B, K, CI, C ] D, R1, R2, L, ST
Back Scale: LL0, LL01, LL02, LL03, DF [ CF, CIF, CI, C ] D, LL3, LL2, LL1, LL0
Multilined cursor: Kw, PS, d, q

Manual 2.44MB

Donated by Anonymous collector and daughter.
The collector, who prefers to remain anonymous, obtained a B.S. degree in Physics from Taiwan's National Tsing Hua University in 1971. His love for computation has encouraged him to build a collection of slide rules, HP and TI calculators, as well as abaci, many displayed at ISRM.

Nestler 29/52 Log Log Duplex
ISRM 12.01.10.2021

Nestler 29/52 Log Log Duplex - 1954
Made in Germany - 24 scales
Front Scale: CT, T, ST, A [B, L, K, C ] D, P, S, CS
Back Scale: LL01, LL02, LL03, DF [ CF, CIF, CI, C ] D, LL3, LL2, LL1
gifted by Wayne H. Keene, PhD. of Boothbay Harbor, Maine. Sent by son-in-law Tim Donahue.
Wayne H. Keene was provided this slide rule in 1954 by a friend in living in Germany, prior to starting his undergraduate freshmen year in Engineering Physics. He used it in hi undergraduate studied while earning his PhD in Physics at Worcester Polytechnic Institute, and then during the early career at Raytheon Company. There he was involved in the development of laser weather radar, laser-based air pollution monitoring systems, and laser-based submarine communications systems.

Nestler 0297 Electronic I Duplex
REF

Nestler 0297 Electronic I Duplex
Made in Germany, 22 scales Improved Dec Trig Log Log
Front Scale: 20Log U₂/U₁, U₂/U₁, √(Z₂/Z₁) [ R.Z, G.Y, U ] J, ln U₂/U₁
Back Scale: dbm Pegel_I, P_I [ U_I, U_II, Z₂ ] Z_ges, P_II, dbm Pegel_II
archive - Scan by Steve Seale Collection, Nashville, Tennessee

Albert Nestler Nr.31 Timber Slide Rule (c1938)
ISRM 14.01.10.01

On the right are scans of 1938 catalog and instructions by Jürgen Nestler in Germany, grandson of founder Albert Nestler (1851-1901). Jürgen said his father used this model of slide rule to calculate the wood required for the production of Nestler slide rules.

Albert Nestler Nr.31 Timber Slide Rule (8inch/20cm)
Cataloge description: (German) Nr. 31 Nestler Holzhandler Rechenschieber - Dieser Rechenschieber ist ein auberordentlich praktisches, unentbehrliches Hilfsmittel, speziell fuer fie gesmante Holzindustrie. Bei Taxationen, Holzkaufen, Holzversteigerungen etc., bei Berechnung von Rund und Kantholz etc., leistet er hervorragende Dienste.
Translated to English: No.31 Nestler Timber slide rule - This slide rule is an extraordinarily practical, indispensable tool, especially for the entire timber industry. In taxation, wood buying, wood auctions etc., when calculating round and square timber, etc., It does an excellent service.
Made in Germany by Albert Nestler A.G., c1938)
Front Scales: A [ l, U ] D
Back Scale: 23cm, 9inch
Original owner: The uncle of Matej Marka's mother, Slovenia

1938 catalog entry

Manual 2.98MB pdf

Nestler 0320 Oil-Rule, Dr. Schmeling
REF

Nestler 0320 Oil-Rule, Dr. Schmeling
Made in Germany br> Front Scale: λ°F, °F, °C, X² [ X², 1:X, X ] X, d15°C, lgx/°API, λ°C
Back Scale: Oil Thickness Hints [ W, Cs, °E, SSU ] Equations
Multilined cursor
Scan by Jürgen Nestler, Hausach, Germany

Nestler Nr. 33 Chemiker
REF

Nestler Nr. 33 Chemiker
Made in Germany
Front Scales: 27cm // Sought [ Found CI C ] D L
Scan by Jürgen Nestler, Hausach, Germany

Nestler 0330 Chemiker
REF

Nestler 0330 Chemiker
Made in Germany
Front Scales: 10.5in // Sought [ Found CI C ] D L
Scan by Peter Owen, UK

Nestler 34 System Hanauer
REF

Nestler 34 System Hanauer
Made in Germany produced from 1912 to 1947.
Front Scales: 25cm // Q(A) [ D, q, C, R ] B C || P, P
Back Scale: [ S, S&T, L, T]
Multi-lined Cursor
Well: Blank
Scan by Otto van Poelje, Netherlands

Nestler 35 System Peter
REF

Nestler 35 System Peter
Made in Germany
Front Scales: 25cm // LL0, A [ B, C ] D LL1 || 25cm
Back Scale: [ S, T]
Well: 29-55cm
Scan by Hubert

Nestler No.36 Electro (c1941)
REF

Nestler No.36 Electro
Made in Germany
Front Scale: 27cm // LL, 100KW, Amps (A) [ distance Km(B)PS, CI, C ] D, LL || K
Back Scale: [ S, L, T ]
Well: Dynamo, Volt
Multilined cursor, wrapped to bottom edge. single hairline on edge.
Back: Electrical Constants (German)
Scan By Andreas Faßbender Collection

Nestler No.37 Electro (c1937)
ISRM 18.11.09.01

Note: Sleeve has "Elektro", Slide Rule "Electro"

Nestler No.37 Electro
Made in Germany
Front Scale: 25cm // V, P.S.(A)100P.S. [ K.W.(B)100K.W,, C ] D, L(U) || LL2, LL3
Back Scale: [ S, S&T, T ]
Well: 30-55.9cm (note: scale on top edge of well)
Multilined cursor, wrapped to bottom edge. 2 hairlines on edge.
Back: Electrical Constants (German)
Gifted by Eileen S. Sappah of Waretown, New Jersey. She found this slide rule the attic of a home she purchased in Ringwood, New Jersey, that was previously owned by a deceased German man.
Note: This is the same model as used by the Soviet rocket scientist, Sergei Korolëv (USSR).

Sergei Pavlovich Korolev (1906-1965) Chief Designer Of Soviet Spacecraft

Smithsonian Air and Space Museum Display, Sergei P. Korolëv

Nestler No.37 Electro (c1941)
ISRM 14.02.28.02

Nestler No.37 Electro - Closed simplex
Made in Germany
Front Scale: 27cm // V, PS(A)100PS [ KW(B)100KW, CI, C ] D, L(U) || LL2, LL3
Back Scale: [ S, S&T, T ]
Well: 30-55.6cm (note: scale on bottom edge of well)
Multilined cursor, wrapped to bottom edge. single hairline on edge. LL2 and LL3 scales shifted.
Back: Electrical Constants (German)
Note: This is the same model as used by rocket scientist Wernher von Braun (Germany/USA). The following photo is taken from the Smithsonian Air and Space Museum Display:

Nestler 0370 Electro (Inch)
ISRM 17.05.02.43

Nestler 0370 Electro (Inch)
Made in Germany - date code 164 (Jan 1964)
Front Scale: 10.5in // V, A(PS) [ B(KW), CI, C ] D, U || LL2, LL3
Back Scale: [ S, S&T, T ]
Multilined cursor
Back: Equivalents (English)
Original owner(s): D. Leach and D. Light
Gift Of Mike Weaver, UK

Nestler 0370 Electro (Metric)
ISRM 09.04.24.06

Nestler 0370 Electro (Metric)
Made in Germany - date code 175 (Jan 1975)
Front Scale: 27cm // V, A(PS) [ B(KW), CI, C ] D, U || LL2, LL3
Back Scale: [ S, S&T, T ]
Multilined cursor
Back: Equivalents (German)
Donated by Jürgen Nestler, Hausach, Germany

Nestler 0373 System Moisson
REF

Nestler 0373 System Moisson
Made in Germany - date code 97
Front Scale: 27cm // ω(2πf), L [ C(ρF) D/I, D•n₁ ] λ(m), f(kHz) || 10.5in
Back Scale: [ blank]
Multilined cursor
Back: Zahl de windungen pro cm - Widerstand pro m (German), Number of turns per cm - Resistance per m
Archive - Scan by Andreas Fassbender Collection, Germany

Albert Nestler A-G No.40 Commercial slide rule c1930
ISRM 23.10.14.01

Prof. Dr. Josef Klöss (1915-2009) Was the youngest of four siblings on a farm in the Swabian village Obermarchtal, Josef was destined to become a priest following family tradition. But after a very unhappy semester at the theological college his father granted his wish to become a physician instead. Continued on right.

Albert Nestler A-G No.40 Commercial slide rule
Made in Germany, 1925 - 1930
Front Scale: 25cm // Z(Zinsen=Interest) [ T(Tag=days), M(m) Metric/Monetary Conversions, D (Discount) ] K (Kapital=capital) || 10in
Back Scale: [ £, S, d ] (equivalents among the divisions of the Pound and the Guinea)
Back: (German) Monentary Conversions (8 currencies listed) and Unit conversions (Eng, USA, Russi.)
Note: the Z and T scales allow the rule to be used for ordinary multiplication and division calculations.
Original Owner: Prof. Dr. Josef Klöss (1915-2009) of Bad Homburg. Germany.
Gift of Martina Schnitzler of Steinen, Germany, Daughter of Joseph Klöss.

Con't.After completing the mandatory Reich Labor Service he started his medical studies in 1938 at the university of Tübingen, followed by Munich, Königsberg, Wien and Freiburg.After his final exams and doctorate in 1942 he was deployed as medical surgeon to the battle fields in Italy. Being captured in 1945 by the American forces he spent his POW time in the employ of various Army Internee Hospitals in Southern Germany before returning to the Medical University Clinic in Tübingen, followed by the University Clinics in Göppingen and Freiburg where he habilitated in 1960. In 1964 he moved on to Frankfurt on the Main as director of the Surgical Clinic at the St. Marienhospital and honorary professor at the Johann-Wolfgang-Goethe University until his retirement in 1984. Josef Klöss passed away in April 2009 leaving behind Margarete, his wife of 58 years, three children and four grandchildren.

Albert Nestler A-G No.40 "Kaufmann" Commercial slide rule
ISRM 12.01.10.01

Albert Nestler A-G No.40 "Kaufmann" Commercial slide rule
Made in Germany, Scale set shown in 1938 catalog
Front Scale: 27cm // q (percentage), Z(Zinsen=Interest) [ T(Tag=days), M(m) Metric/Monetary Conversions, D (Discount) ] K (Kapital=capital), L(line of numbers in equal parts) || 10in
Back Scale: [ £, S, d ] (equivalents among the divisions of the Pound and the Guinea)
Back:(German) Unit conversions (Eng, USA, Rußi.)

Original Owner: Martin Vaupel in Bremen, Germany (Engraved in well of slide rule and embossed on case
Note: the Z and T scales allow the rule to be used for ordinary multiplication and division calculations.
Note: Compare with the pre 1938 specimen. Added q and L scales, and has a longer 27mm rule. Also back label has changed.

Albert Nestler A-G No.40 25cm
REF

Albert Nestler A-G No.40 25cm
Made in Germany
25cm // C [ D, Metric/Monetary Conversions, I(Interest) ] A || 11-5/8in
Back Scale: [ L, S, d ]
Archive - Scan by Peter Owen, UK

Albert Nestler A-G No.40 15cm Commerce Pocket
REF

Albert Nestler A-G No.40 15cm Commerce Pocket
Made in Germany
15cm // Z(Zinsen=Interest) [ T(Tag=days), M(m) Metric/Monetary Conversions, D (Discount) ] K (Kapital=capital) || 6in
Back Scale: [ £, Sh, d ]
Original owner (from Greece): Tim Δ. ΠΑΜΠΟΥΚΑΖ (written on back).
Archive - Scan By Andreas Fassbender Collection, Germany

Nestler 0408 Hanseat
ISRM 09.04.24.08

Nestler 0408 Hanseat (Finance)
Made in Germany - date code 166 (Jan 1965)
Front Scale (extended)
DF(KZ) [ CF(T), CI(%), C(T) ] D(Z)
Back:Blank
Dual lined (red and black) cursor
Donated by Jürgen Nestler, Hausach, Germany

Insert, Cleaning Instructions

Albert Nestler A-G Model No. 41 4in Pocket (1923)
ISRM 20.04.10.163

Albert Nestler A-G Model No.41 4in Pocket (1923)
Made in Germany
Front Scale: A [ B, C ] D
Back Scale: 11.5cm [ S, L, T ] 4.5inch
Original owner. L.W. Hodson. Promeo on sleeve: Schwitzer-Cummins Company,, Indianapolois
Gift Of Philip Stanley Collection

Albert Nestler A-G No.41 4in Pocket (1923)
ISRM 13.12.03.02

Albert Nestler A-G No.41 4in Pocket (1923)
Made in Germany
Front Scale: A [ B, C ] D
Back
11cm [ S, L, T] 4.25inch
Note: Cracked glass

Albert Nestler A-G No.41 Pocket (c1925)
ISRM 21.02.16.03

Albert Nestler A-G No.41 Pocket (c1925)
Made in Germany - No Model number on slide rule
Front Scale: A [ B, C ] D
Back
11.5cm [ S, L, T] 4.50inch

Albert Nestler No.41 Pocket (c1925)
ISRM 20.04.01.251

Albert Nestler No.41 Pocket (c1925)
Made in Germany - No Model number on slide rule.Missing lens
Front Scale: A [ B, C ] D
Back
11cm [ S, L, T] 4.25inch
Back: Earl's Cement Promo
Gift Of Philip Stanley Collection

Albert Nestler 42 (possibly) 4in (1923)
ISRM 20.04.10.413

Albert Nestler 42 (possibly) 4in Pocket (1923)
Made in Germany
Front Scale: A [ B, C ] D
Back: 11.5cm [ blank] 4.5inch
Back advertisement: The Warner& Swasey Co., Cleveland, Ohio.
Gift Of Philip Stanley Collection

Albert Nestler No.42Z 10cm (c1925)
ISRM 20.04.01.122

Albert Nestler No.42Z 10cm Pocket (c1925)
Made in Germany - Thin film cursor.
Front Scale: 10cm // A [ B, C ] D
Back slide: [ blank ]
Back: Waelde, Kade & Erath Promo, Stahlbauten, Schwäb Hall, Steinbach.
Gift Of Philip Stanley Collection

Nestler 0439 System JAKOB (Reinforced Concrete)
ISRM 09.04.24.11

Nestler 0439 System JAKOB (Reinforced Concrete)
Made in Germany - date code 274 (Feb 1974)
Front Scale (extended)
27cm, Yh(Kx), Yh(Kz), // K, A [ B, R(Fe) CI, C ] D, Yh(m), || Yh(Kf),Yh(Kf),
Back Scale: [ S, S&T, T ]
Multilined cursor
Back: Equivalents (German)
Donated by Jürgen Nestler, Hausach, Germany
See Explanation and how used at Ron Manley's site

Nestler Elemath RS Duplex
ISRM 09.04.24.14

Nestler Elemath RS Duplex - c1975
Made in Japan by Uchida Yoko Co. for Nestler
20 scales - Student Rule
Front Scale: K, A [B, CI, C ] D, L
Back Scale: T1 (Tan>45° Cot), T2 (tan< 45° Cot), DF [ CF, CIF, CI, C ] D, S (Sin Cos), ST < 6°
Multilined cursor: Kw, PS, d, q
Donated by Ted Hume and the Oughtred Society, through the generosity of Jürgen Nestler - Sets of these are available in the ISRM Loaner Program

Manual 2.44MB (Includes above scales)

Nestler Polymath-Duplex
ISRM 09.04.24.10

Nestler Polymath-Duplex - c1975
Made in Germany - 24 scales
Front Scale: LL01, LL02, LL03, A [B, L, K, C ] D, LL3, LL2, LL1
Back Scale: Cot) T, ST, DF [ CF, CIF, CI, C ] D, P, S Cos
Multilined cursor: Kw, PS, d, q
Donated by Jürgen Nestler, Hausach, Germany

Insert, Cleaning Instructions (Elemath and Ploymath series)

Nestler Elemath Log Log
ISRM 09.04.24.07

Nestler Elemath Log Log - c1975
Made in Germany - 25 scales
Front Scale: L, K, A [B, BI, CI, C ] D, LL1, LL2, LL3
Back Scale: T1 Cot, T2 Cot, DF [ CF, CIF, CI, C ] D, P, S Cos, ST
Multilined cursor: Kw, PS, d, q
Donated by Jürgen Nestler, Hausach, Germany

Nestler A-G System Kolb (Dairy)
REF

Nestler A-G System Kolb (Dairy)
Made in Germany - c1960 Modern logo.
Note: Funkes Molkereischieber nach Ing. K. Kolb. (Calculates percentages and yields of cream, butter, whole milk, etc.)
Front Scale: I [ II, III ] IV
Back: [ blank ]
Archive - Scan By Andreas Fassbender Collection

Nestler Convoy Traffic Separation
ISRM 21.07.01.01

Nestler Convoy Traffic Separation - dc1976
Made in Germany - Note: Text is in Dutch and French
Note: ABL Règla à calcul pour mouvements routiers. (French)
Note: Designed to optimize the separation of road vehicles, especially commercial trucks.
Front Scale: 27cm // Distances-Astanden [ miles, km, Minutes-Minuut, 1 to 15 hr-Uur ] D, Nombre de véhiclules, Aantal voertuigen
Back Scale: 10.5 inches
Sleeve Promo: Westf. Versandhaus, für Lichtpaus-Zeichen-und Vermessungsbedarf G.m.b.H., Bielfeld. Ruf: 61811/12
Donated by Andreas Faßbender of Germany

Albert Nestler Entfernungsmesser (Range Finder) c1938
REF

Albert Nestler Entfernungsmesser (Range Finder) c1938
Made in Germany - Note Swastika symbol in detail
Front Scale: Em:, Gerätekonet //Ablage in Winkelsekunden [ Ablage in m, Wahre E in hm ] Gerätekonstante || 36cm
Back Scale: Blank
Back: Rechnungsbelspiele (instructions German)
Donated by Andreas Faßbender of Germany

Nestler Aircraft Tracking (Fluggeschwindigkeit) 25cm/10in cWWII
ISRM 21.10.15.01

Nestler Aircraft Tracking (Fluggeschwindigkeit) 25cm/10in cWWII
Made in Germany by Albert Nestler - Labels all in German.
Front Scale: 1:3000000 km // Entefernung km [ Flugzeit Min.Stunden, Flug-Geschw. ] Fluggeschwindigkeitkm pro Stunde \\ 1:1000000 km
Back : blank
Note: This slide rule was used to calculate the speed and direction of flight of allied aircraft bombing formations with the help of a signal box to provide advance warning to intended targets in Germany.
This 10 inch specimen and a 20 inch version, with a full description of its use are in the Military gallery along with more WWII era photos.

Nestler Vereinigte Glanzstoff-Fabriken Pocket Textile c1956
REF

Nestler Vereinigte Glanzstoff-Fabriken Pocket Textile c1956
Made in Germany - for Glanzstoff-Fabriken AG
25 scales
Front Scale: 13cm // K, A [ B, CI, C ] D, L
Back Scale: [ Ne_Bw, Td, Ne_Kg ]
Back: Formulae used for textiles.
Back Company promos: Kunstseiden AG, Wuppertal, Elberfeld; Vereinigte Glanzstoff-Fabriken AG, Wuppertal, Elberfeld; Spinnfaser AG, Kassel.
Multilined cursor
Photo from the David Rance Collection, The Netherlands.

Nestler RP 75 Pocket Circular (c1960's)
REF

Nestler RP 75 Pocket Circular (c1960's)
Made in Germany by Nestler
7.5cm Diameter, 6 scales
Front Scale: L, D ( C, CI, A, K )
Back Blank
Photo from the Andreas Fassbender Collection, Germany.

Nestler RL 130 Pocket Circular (c1960's)
REF

Nestler RL 130 Pocket Circular (c1960's)
Made in Germany by Nestler
13.0 cm Diameter, 6 scales
Front Scale: Kg, B(%), D ( C, CI )
Back Slide:
Photo from the David Rance Collection, The Netherlands. Squaring the Circle - Overlooked Nestler Models by David Rance. Covers Nestler circular slide rules.

Albert Nestler 'Star' Structural Beam Tables
REF

Pages 0-III (0-3)

Albert Nestler 'Star' Structural Beam Tables C1913)
Made in Germany by Albert.
Designed by Emil Wolf of Strasbourg i.E.,.Patent: D.R.G.M. 565806 issued 10.9.1913
Note: The Great War (WWI) in 1914 interrupted and prevented the mass production of this unique specimen.
Fold out tables used with extendable cursor lens to read 14 (numbered 0-13 or 0-XIII) pages.
Materials: Celluloid scales screwed or glued onto mahogany; book consists of heavy paper or cardboard pages.
Note: The book portion of the device may be opened when the plastic cursor lens is retracted downward past the scale on the cover labelled 'Kg'
Front Scale: Kg [ ?, ?, C ] D || n², L
Back Scale: [ U, F ]
Cursor: 2.2 X 4.3 X 1.5 cms; metal framed extendable plastic lens; lines = three, defining areas designated as 'E' and 'H'
Table Pages:
[ Blegung: Pag. I-IV ]
[ Druck,Zug, Ascheerung: pag.V-VI ]
[ Knickung: Pag. VII-XII ]
[ Wichtiger Drucktext: Pag. 0 und XIII ]
Scan and description by Steve Seale collection. Edits by Andreas Fassbender.
Full Resolution (6682x10630 px) of tables

Pages IV-IX (4-9) and X-XIII (10-13)

Albert Nestler 1938 Product Line Catalog
This was produced in celebration of the 60th anniversary. Scanned by Jürgen Nestler, Hausach, Germany

Nestler 1967 Product Line Catalog
Scanned by Jürgen Nestler, Hausach, Germany

Article in German Newspaper
on Jürgen Nestler.

Pre-WWII family tree of countries that Nestler was shipping slide rules to.

Albert Nestler Envelope postmarked Febuary 17, 1928.

Albert Nestler 1936 Advertisement.

These pictures, provided by Jürgen Nestler, show images of the Nestler factory in Lahr, Germany in the 1950's. Of special interest is the images of the dividing engine used to create the divisions on multiple slide rules simultaneously. Lady workers inspect slide rules and adjust the cursor hairline to the index before shipping.

These pictures, provided by Jürgen Nestler, are of the grand opening of the Nestler exhibit in the Lahr Museum in Lahr Germany. Jeurgen may be seen standing next to the mayor of Lahr.

Albert Nestler Timeline

1878 - Albert Nestler and Theophil Beck establishes factory in Baden, Germany to make slide rules. Company named Beck and Nestler
1878 - at the beginning Nestler works with dividing engine
1886 - Slide rule have celluloid laminations on mahogany stocks and slides by Dennert&Pape, Scales divided by Nestler factory.
1890 - Produces Universal Slide Rule (also exported for K&E, Dietzgen and other more in the USA).
1890 - Glass cursor with metal edge guides used.
1900 - Nestler begins making their own cursors for slide rules.
1901 - Albert Nestler dies. Succeeded by sons Albert and Richard.
1901 - Laminations reinforced with screws
1902 - Model number based on simple digits 1, 2, 3,...40,44, etc.
1902 - Max Rietz patent 181110 puts on 2 scales for cubic and mantisse and T & S on the slide. 1903 - Nestler produces first "Rietz" scale set based on Max Rietz Patent and it becomes Nestler's highest seller in Germany.
1905 - Nestler starts manufacturing their own stocks. Some slide rules having D&P stocks are sold many years afterwards until inventories are used up. (about 1911).
1905 - Nestler Patent DRP 173660 with "springy back plate pressed against the ruler". Metal sheetmetal framed cursor introduced.
1908-1911 - "ALBERT NESTLER LAHR i/B" used as logo in well of Nestler and D&P stocks
1910 - Semi-circle magnifier glued to some glass lens provided as an option.
1911-12 catalog shows 56 different models
1922 - Company becomes "ALBERT NESTLER AG".
1923 - Albert Nestler's daughter becomes a slide rule provider to Nestler, MASSAG in Schaffhausen, Switzerland
1924 - A French book describes 32 models of Albert Nestler slide rules.
1928 - Plastic edge cursor attached to sheet metal cursor with screws
1928 - Mahogonay duplex slide rules introduced (American 29)
1932 - On equivalents labels, the conversion changed the Nautical mile = 1851.1 meters to 1852 meters.
1934 - all plastic(celluloid) pocket slide rules introduced
1934 - some low cost slide rules with folded plastic film cursors intriduced
1938 - Catalog shows model number from 1 through 43. 28 cursor designs are shown.
Pre-WWII - Nestler is shipping slide rules to 60 countries - see Nestler Country Family Tree
1941 - Bright metal plated metal (steel) framed cursors introduced
1945 - Production facility damaged by war and equipment confiscated by French occupation forces.
1950 - Nestler family makes a new beginning, creating new models of simplex Rietz, Darmstdt and Electro. Screws on laminations
1951 - Screws on laminations removed as adhesives are improved.
1951 - Injection molded all-plastic cursors introduced
1954 - Some slide rules are made in Switzerland (Nestler daughter MASSAG in Schaffhausen since 1923)
1955 - All plastic double-sided slide rules introduced. Polymath, Multipath, Rietz and the "School" series
1955 - Company name is now just "NESTLER".
1955 - 2-digit model numbers replaced with 4-digit numbers.(beginning with "no.0320 Oilrule,system Schmeling)
1962 - Metal and plastic duplex slide rules introduced.
1967 - Catalog shows 30 different slide rule models with 7 demonstration models.
1972 - Nestler OEM's slide rules from Uchida Yoko Co. Japan
1978 - Nestler stops selling slide rules after 100 years due to the electronic calculator. Company concentrates on drafting equipment and CAD software on computers.
1994 - Company closes down.

Nestler Slide Rule Date Tracing by Guus Craenen (IM1995 Proceedings)