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Keuffel and Esser Duplex Power Computing Slide Rule N4135 7" Linear slide rule

Major collection: Science & Technology
Named collection: Keuffel & Esser Company Collection
Object type: slide rule
Maker: Keuffel & Esser Co.
Place made: United States, New York
Materials: metal; celluloid
Measurements: 1/4 in x 7 in x 1 3/4 in

Manufacturer's prototype.

Model 4135 Catalog Pages

Keuffel & Esser Company Slide Rule Collection Donated by InteliCoat Technologies

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