British Tungsram Radio Works
From Graces Guide
of West Road, Tottenham, London.
1930 Tungsram Electric Lamps
1933 Private company established as British Tungsram Radio Works, a subsidiary of the United Incandescent Co of Budapest, which manufactured valves by importing and sealing parts made elsewhere.
WWII: started production of valve components that it could not purchase.
1961 Manufacturers of wireless and other valves, industrial and domestic lamps.