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 140,059 pages of information and 227,378 images on early companies, their products and the people who designed and built them.

BTH: Mazda

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March 1921.
November 1922.
February 1928
September 1928.
December 1928.
October 1931.
March 1932.
September 1937.
April 1946.
August 1946.
March 1953.
October 1953.
24 February 1956 Advert from Mechanics Magazine.
20 April 1956 Advert from Mechanics Magazine.

Brand of electric filament lamps for cars and other uses, and electronic valves, made by BTH Rugby.

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Sources of Information