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 142,981 pages of information and 229,144 images on early companies, their products and the people who designed and built them.

Hadley Telephone and Sound Systems

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1961 Standard Industrial Group acquired Hadley Telephone and Sound Systems[1], perhaps this was the same as Hadley Sound Equipments?

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Sources of Information

  1. The Times, 7 April 1961