RAF Trousers mfg By F.W. & CO. LTD. These Vintage British Men's Trousers RAF Size #4 (32"x29.5") MFG F.W. Harmer Co. & LTD are in excellent condition, however, I did find a very tiny hole in the back side of the butt please see the pictures. The history of RAF trousers manufactured by F.W. Harmer & Co. dates back to the early 1950s when the company opened its factory in Fakenham. The trousers were produced for the Royal Air Force and were known for their quality and durability. The factory's production was a significant part of the company's operations, and the trousers were well-regarded for their use by aircraft firefighters. The company's commitment to quality and service was evident in the production of these trousers, which were designed to withstand the rigors of military service.