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Item#TypeModel No.Match No.Variant No.Model NameMakerCountryProduction or Serial No.MaterialScale LengthDateCondition
KEU072Linear
N4096
4364
n/a
Desk Slide RuleKeuffel & EsserUSA
432967
Engine divided celluloid laminated mahogany
"20"
1932
C5

Notes: Desk model of Merchant's slide rule. Frameless glass indicator with plastic guides. Model number: . Patent notation on left above DF scale: PAT. JUNE 5. 1900.

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