Grace's Guide

British Industrial History

Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 142,972 pages of information and 229,026 images on early companies, their products and the people who designed and built them.

Charles Schmalcalder

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of 82 Strand, London

Scientific instrument maker.

A fine brass protractor, with rack and pinion adjustment, dated 1810-26, was included in Bonhams sale in London, 20 May 2014.

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