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Details and Image
Item#
Type
Model No.
Match No.
Variant No.
Model Name
Maker
Country
Production or Serial No.
Material
Scale Length
Date
Condition
KEU137
Linear
4061T
4169
n/a
Duplex Trig
Keuffel & Esser
USA
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.
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Condition Code
to obtain more details.
