Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 148,470 pages of information and 233,895 images on early companies, their products and the people who designed and built them.
of Exactor Works, Alperton, Middx (1939)
of Dorland House, Lower Regent Street, London, W1
1937 Hydraulic controls for aircrafts. "Exactor" Hydraulic Remote Controls. 
1939 See Aircraft Industry Suppliers