You are in luck as the Makers are still in business although now situated in Yorkshire, England. He has full records of W.Richards guns; http://www.wrichardsguns.co.uk/ Your gun passed through the Birmingham Proof House sometime between 1925 and 1954. And, as it lacks a proof House date letter code that should narrow it to between 1941 and 1950 when they stopped coding them for some reason. If you click on the link you should be able to get more information. Lagopus.....