Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 142,913 pages of information and 228,821 images on early companies, their products and the people who designed and built them.
A. Brown, B.Sc., A.M.I.E.E., M I R.S.E.
1939 Rly. Systems Engr., Standard Telephones and Cables Ltd., London.