Archive of Collections



Details and Image



Item#TypeModel No.Match No.Variant No.Model NameMakerCountryProduction or Serial No.MaterialScale LengthDateCondition
KEU099Linear
4031
4052
n/a
Mannheim AdjustableKeuffel & EsserUSA
97938
Engine divided celluloid laminated mahogany
"5"
1924
C3

Notes: "Scale labels added to front of slide rule. Conversion table on back of slide rule changed to shortened version of US Bureau of Standards Circular 47 table. Font of company/city, patent, and Made in U.S.A. increase in size."

Click on the Condition Code to obtain more details.