Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 143,908 pages of information and 230,121 images on early companies, their products and the people who designed and built them.
Roy M. Barnard B.Sc.(Hons.), Eng., A.M.I.E.E., A.M.I.R.E.
1939 Engineer on Telephone Transmission, Standard Telephones & Cables, Ltd., Connaught House, A ldwych, W.C.2. Private address: 175, St. Pauls Avenue, Kenton, Mddx.