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 148,405 pages of information and 233,863 images on early companies, their products and the people who designed and built them.

Reproducers and Amplifiers

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September 1933.
September 1947
August 1948.
January 1949.
March 1949.
June 1949.
September 1949.
December 1951.
June 1955.

of Frederick Street, Wolverhampton.

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Sources of Information