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 146,701 pages of information and 232,164 images on early companies, their products and the people who designed and built them.

Douglas Holt

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September 1937.
April 1940.
June 1941.
January 1944.
February 1947.
March 1949.
May 1949.
October 1949.
August 1950.
October 1951.
October 1955.
January 1957.
1964.

Holts (established 1919) made many products, such as Radweld and Britect.

1959 Name changed to Holt Products.

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