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of 15/18 Clipstone Street, London, W.1.
1924 Private company formed - presumably General Radiological Surgical Apparatus Co Ltd
1929 General Radiological Ltd was incorporated
1936 Name changed.
1940 Company established.
1949 Murphy Radio acquired General Radiological Ltd and Solus-Schall Ltd, concerned with manufacture of X-ray equipment, and partially amalgamated them. Also acquired Solus Electronic Tubes which made the X-ray tubes.
1951 Maker of X-ray tubes; vacuum tubes; high-voltage rectifying valves; glass-to-metal seals.
1960 Had supplied nuclear instrumentation to all of the nuclear power stations in the UK
1961 Manufacturers of medical X-ray, electro-medical equipment and nuclear health instruments. 350 employees. 
 London Science Museum Collection