Archive of Collections



Details and Image



Item#TypeModel No.Match No.Variant No.Model NameMakerCountryProduction or Serial No.MaterialScale LengthDateCondition
KEU420Linear
4061
4167
n/a
DuplexKeuffel & EsserUSA
48
Engine divided celluloid laminated mahogany
"6"
1916
C5

Notes: Frameless glass indicator with celluoid/plastic guides. Patent notation moved below D scale near middle of slide rule.

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