Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 133,099 pages of information and 210,772 images on early companies, their products and the people who designed and built them.
Glass envelopes were manufactured by BTH at Chesterfield
By 1956 AEI Lamp and Lighting Co was a part of AEI
The reconstituted board of directors was as follows: Mr A. Deutsch, chairman, Mr. J. G. Christopher, Mr J. Clement, Mr S. R. Eade, Mr S. Hale.