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Sperry Pocket Calculator S915. Keuffel & Esser Co.

Object/Artifact
E.A. Sperry's [Pocket] Calculator. Keuffel & Esser Co., New York (and Hoboken.) S915; a circular dial calculator considered part of the genre of slide rules. With leather case with snap cover (snap: United-Carr; founded 1929) ---- PDFs on file of: 1911 patent; Oughtred Society article.

2013.005.0085

2013.005

Lukacs, Claire

Gift

Museum Collections. Gift of a Friend of the Museum.

1920 - 1935

Date: 1920-1935

Fair

Status: OK Status By: dw Status Date: 2015-06-11

side with Sperry name
Side with Keuffel & Esser Co., N.Y. edge detail with model number views of leather case with K&E Co. monogram; snap monogram Sperry Pocket Calculator S915. Keuffel & Esser Co. picture number 6 Sperry Pocket Calculator S915. Keuffel & Esser Co. picture number 7