Archive of Collections



Details and Image



Item#TypeModel No.Match No.Variant No.Model NameMakerCountryProduction or Serial No.MaterialScale LengthDateCondition
KEU137Linear
4061T
4169
n/a
Duplex TrigKeuffel & EsserUSA
14
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.

Click on the Condition Code to obtain more details.