Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 148,108 pages of information and 233,634 images on early companies, their products and the people who designed and built them.
of St. Andrew's Works, Crofton Park, London, SE4
Manufacturers of ship telephones; later producers of Amplion
1894 Company established.
1894 "Mr Alfred Graham's" ingenious loudspeaking telephone was used in scientific research on acoustics.
1911 New factory set up at Brackley.
1914 Electrical engineers and contractors. Specialities: loud speaking telephones, exchange switchboards and other apparatus for communication on board war and mercantile vessels, for use in power stations, mines, collieries etc. Employees 300. 
1919 "No less than 12000 ship installations" of Graham's telephones had been made.
1922 Listed Exhibitor - British Industries Fair. Manufacturers of Gramophones of quality and distinction (Algraphones); Spring Motors; "Sonat" Sound Boxes; Record Filing System; also Gramophone Components and Accessories. (Stand No. B.27) 
1929 Ground-air wireless demonstrated for instructional purposes.
1937 Advert for Triton telephones and Graham patent indicator for rudders.
1938 Altered memorandum of association to include pension.