Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 143,368 pages of information and 230,031 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