BSA A7 500

Sorry, still not the actual machine. My memories are very vague, other than I'd blown up my number 2 Matchless, and needed something similar. I'm not even sure that this was the right place in the sequence. However, I did own a mid-fifties A7, although it had an iron-head, unlike this fire-snorting beast. Curiously I do recall that it was a very pleasant bike to ride at its comfortable speed (probably 50-60). I have no recollection of how I disposed of it.