I worked at Hercules Cycles in Rocky Lane Aston Cross in 1945 (I packed disassembled cycles in wooden crates for export), I was 15 and left when I joined the RAF in 1948. Later on in years I remember a specialist cycle factory in Greet, I think the name was 'Dawes' and specialised in lightweight racing bikes. this would be in the 60's. I believe BSA made cycles about that time too. There was a company in either Pritchett St or Phillips St, Aston called Phillip's who made various bits and pieces for cycles such as pumps, saddles lamps etc.... Eric