Archive of Collections

Details and Image

TypeModel No.MakerCountryConstruction
DateScale LengthArea of Use
K & E /40701T with Clamshell Cursor
Keuffel & Esser
Celluloid over wood
25 cm

Notes: "The K&E model 4071T is the familiar Cox Duplex with the addition of a single trig scale to each side, and an L scale. This particular 4071T can be dated with unusual precision thanks to K&Es numerous small changes over the life of this model. The clamshell cursor makes it pre-1915, the L-shaped, adjustable end brackets make it post-1911, and the location of the L scale on the edge vs. the face makes it pre-1913. "

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