British Thomson-Houston Co. Ltd (BTH) was a diversified engineering company headquartered in Rugby, Warwickshire, that had been founded in 1894 as the British subsidiary of the USA's General Electric. In 1928 it was merged with Metropolitan-Vickers to form Associated Electrical Industries (AEI), which itself later merged with GEC.
The BTH Type E moving-iron cone loudspeaker was introduced in August 1925 with a chromium-plated body. This Form E of the type appeared in 1928, the body of brown Bakelite. 15 inches high and 13 inches wide, the loudspeaker originally cost £3.0s.0d.
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