Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 143,447 pages of information and 230,060 images on early companies, their products and the people who designed and built them.
Constant Speed Airscrews Ltd of Avon Works, Wharf Street, Warwick
1938 Advert for VDM variable pitch airscrews, as used on Messerschmidt 109's world land speed record; also on flight from London to Brazil 
1939 See Aircraft Industry Suppliers
1945 Advert for propeller spinners
Name changed to C. S. A. Industries