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Details and Image



Item#TypeModel No.Match No.Variant No.Model NameMakerCountryProduction or Serial No.MaterialScale LengthDateCondition
KEU134Linear
N4035
4058
n/a
Mannheim AdjustableKeuffel & EsserUSA
308600
Engine divided celluloid laminated mahogany
"8"
1929
C5

Notes: Slide rule widened. Notations moved from below D scale to above A scale and MADE IN U.S.A. added. Scale labels added on left end and model number moved to right end with N added to signify a major change. Conversion table changed to UBS Circular 47.

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