Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 148,100 pages of information and 233,633 images on early companies, their products and the people who designed and built them.
Retail outlet: 25 Savile Row, London. Works: Slough
Graham Amplion of 230 Tottenham Court Road, London, W1. Telephone: Museum 9648
1928 William Harold Lynas was recognised as past MD of the company in flotation of Wireless Pictures Ltd.
1928 New development: Lion loudspeaker.
1929 In association with the inventor, R. M. Hamilton, produced the Amplion Totalisator for race courses.
1930 Exhibited a radio receiver at the National Radio Exhibition at Olympia 
1932 Perhaps formation of Amplion (1932) Ltd?
1939 Graham Amplion Ltd was struck off the register of companies
1947 Listed Exhibitor - British Industries Fair. Manufacturers of Radio Loudspeakers, Reproducers, Pickups, Mains-Units, Battery-Eliminators, Pocket-Voltmeters. (Olympia, Ground Floor, stand No. C.1542) 
1962 Company wound up by the High Court on application of Optical Products Ltd, a supplier.