Andy, I thought all these rifles had a two flat cross section springs in. Mine have, when did they switch to a one piece round section ordinary spring ?
Highly recommend John M’s Book on the BSA. Tells you when these kind of changes were made. My 1912 had one long spring, my 1914 had 2 springs.
It certainly is an excellent book. Very informative and interesting. Since I started running out of Webleys to collect, I had dabbled with old BSAs. From that book (& Mr Knibbs’) I’ve learnt a lot.