Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 143,415 pages of information and 230,040 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.