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Details and Image



Item#TypeModel No.Match No.Variant No.Model NameMakerCountryProduction or Serial No.MaterialScale LengthDateCondition
KEU593Linear
4031
4052
1
Mannheim AdjustableKeuffel & EsserUSA
94134
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. Scales labels front and back are in serif font."

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