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.

Sphere Radio

From Graces Guide

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

Heath Lane, West Bromwich.


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Sources of Information