Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 143,344 pages of information and 230,023 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.