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 148,106 pages of information and 233,633 images on early companies, their products and the people who designed and built them.

Sphere Radio

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August 1948.
June 1949.
December 1951. Jay ceramic capacitors.

Heath Lane, West Bromwich.

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Sources of Information