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Details and Image



Item#TypeModel No.Match No.Variant No.Model NameMakerCountryProduction or Serial No.MaterialScale LengthDateCondition
KEU194Linear
4092
4323
n/a
Log Log DuplexKeuffel & EsserUSA
14
Engine divided celluloid laminated mahogany
"10"
1909
C5

Notes: Metal framed glass clamshell indicator. Scale set: A [ B S C ] D on front; LL1 LL2 LL3 [ C T CI ] D L on back. Company/city and patent notations on front side of slide rule below D scale. Exposed mahogany on edge.

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