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 142,972 pages of information and 229,026 images on early companies, their products and the people who designed and built them.

Submarine Signal Co

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1933. Shallow Water Fathometer.
September 1947
August 1948
1951. S. G. Brown incorporating the Submarine Signal Co.
April 1952.

of Shakespeare Street, Watford, Herts.

Agents for Raytheon Manufacturing Co.

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