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Details and Image



Item#TypeModel No.Match No.Variant No.Model NameMakerCountryProduction or Serial No.MaterialScale LengthDateCondition
KEU393Linear
4054
4145
3
Polyphase Mannheim AdjustableKeuffel & EsserUSA
371580
Engine divided celluloid laminated mahogany
"10"
1948
C4

Notes: Improved glass indicator. Model number moved to left side of slide and K&E stylized logo added to right end of slide. Patent notation moved next to MADE IN U.S.A. and moved to right end of slide rule.

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