Archive of Collections



Details and Image



Item#TypeModel No.Match No.Variant No.Model NameMakerCountryProduction or Serial No.MaterialScale LengthDateCondition
KEU566Linear
4051
4671
n/a
Mannheim AdjustableKeuffel & EsserUSA
59997
Engine divided celluloid laminated mahogany
"20"
1922
C5

Notes: Patent and company/city notations moved above A scale and MADE IN U.S.A. added. Scale labels added to left end of slide rule and model number moved to right end of slide. Scales on slide reverse changed from S T L to S L T.

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