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 142,863 pages of information and 228,791 images on early companies, their products and the people who designed and built them.

D. S. Plugs

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September 1953.
May 1957.

of Preston, Lancashire

1940 Private company formed as Switchgear Units Ltd.

1946 Name changed.

1961 Manufacturing electrical engineers.[1]

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