Archive of Collections



Details and Image



Item#TypeModel No.Match No.Variant No.Model NameMakerCountryProduction or Serial No.MaterialScale LengthDateCondition
KEU619Linear
4035
4520
n/a
Mannheim AdjustableKeuffel & EsserUSA
461
Engine divided celluloid laminated mahogany
"8"
1914
C4

Notes: Indicator changed to frameless glass with metal guides. Celluloid lamination removed from slide well. Patent notation moved from slide well to front of slide rule below D scale.

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