5.14 Nestler, Germany
Another German maker of fine slide rules, Albert Nestler AG was founded in 1878 and lasted 100 years in the slide rule business. According to the Oughtred Society Albert Einstein favored the Nestler in his work, particularly the No. 23R. The same claims are made for Wernher von Braun, the famous German-American aerospace engineer.
Albert Nestler made his own dividing engine that he used to place scales on stocks, first those purchased from Dennert & Pape, and later stock that Nestler manufactured themselves. Prior to World War II, Nestler was shipping slide rules around the world, including to the USA. (For example, see Kolesch and Company, USA.) Their slide rule production ended in 1978.
Total number of Albert Nestler slide rules in the collection: 5. \(~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\)
||1920||L||wd||10||yes||rule in very nice condition; case: No 1a Albert Nestler AG; back: SLIDE RULE DATA SLIPS, compiled by C.N. Pickworth, Wh.Sc.; no Nestler name on rule itself; no scale on sides of rule; interesting curiosity|
|33 Chemiker||1924-1933||L||wd||10||yes||Early Chemical Rule, Albert Nestler A.G. LAHRi/B D.R. Patent Germany; Pickworth Data Slip on back; wide 1-line cursor|
||1925||L||wd||4||yes||small 4 inch rule; marked Germany on inside of stock and on leather case; similar items elsewhere marked Nestler|
||1930||L||wd||20||yes||rule in very nice condition; original wooden box with felt liner and Nestler logo inside|
|23R||1937-1945||L||wd||10||yes||rule in very nice condition; lid to case is missing; top of sleeve has acceptance stamp of the Kriegsmarine – Reichsadler with a swastika in an oak leaf ring and the letter M for Marine|