Superb little boxlock. I was hoping the proof marks would show a date letter code. As it hasn't got one it would indicate a date between 1941 and 1950 when they dropped the mark for some reason. The thing that interests me is the JA letters on the barrel. I bought a J & W Tolley 2" chamber boxlock ejector the other day which I know was made by Skimmin & Wood in 1936. That has the exact same mark (JA) on the barrels. Someone who worked on both guns? I will ask a Gunsmith friend who is knowledgable about these marks and see if he can come up with an owner to those initial. Very nice indeed! Lagopus.....