Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 148,545 pages of information and 233,966 images on early companies, their products and the people who designed and built them.
of 45 Nightingale Lane, Balham, London, SW12.
of 111 Charing Cross Road, London, WC2
1937 Manufacturers of wireless/telegraphy apparatus as applied to aircraft.
1939 See Aircraft Industry Suppliers
1943 Presented microphone and amplifier to South London Hospital for Women.
1947 Name changed.