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Keuffel and Esser "Challenge" N9725 1/2 drafting set
Named collection: Keuffel & Esser Company Collection
Object type: drafting instrument
Maker: Keuffel & Esser Co.
Materials: leather; velvet; metal
Measurements: 1 in x 9 3/4 in x 4 1/2 in
Black leather case fastens with two snaps; "N9725 1/2" printed in bronze on lower left front. "Germany" printed in bronze on lower right back. Interior lined with green velvet. Center tray holds ten various instruments including compasses and extra lead and point cases. Small white plaque in lower right corner of tray reads in gold " "Challenge" // Keuffel & Esser Co. // NY".
Keuffel & Esser Company Slide Rule Collection Donated by InteliCoat Technologies