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 148,100 pages of information and 233,633 images on early companies, their products and the people who designed and built them.

Portadyne Radio

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September 1933.
August 1937.
September 1953.

of Portadyne Works, Gorst Road, London

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