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 149,267 pages of information and 234,239 images on early companies, their products and the people who designed and built them.

Polygon Engineering

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Polygon Engineering Works, 65A, Old Town, Clapham, S.W.

1904 Leslie Haywood Hounsfield founded the business

1913 Made his first car

1914 Leslie Hounsfield moved his business to Vicarage Road, Croydon where a second prototype car was built. The business was renamed Trojan in 1914 but Hounsfield lacked the capital to start production.

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