Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 143,446 pages of information and 230,060 images on early companies, their products and the people who designed and built them.
of Purley Way, Croydon, Surrey. Telephone: Thornton Heath 3211. Cables: "Instradio, Croydon"
1910 Exhibited at the Physical Society's Exhibition.
1940 Coil Resistance 200 Ohms Mk1. 
1947 Listed Exhibitor - British Industries Fair. Manufacturers of Scientific Instruments. (Olympia, Ground Floor, Stand No. A.1036)