No, and unless you can find the mark with a lion and the letters PV on the barrels it will only ever have been proofed for black powder and that is even if the barrels are still in good order. It will almost certainly have 2 1/2" chambers, this is usually indicated by the chamber length in Millimeters i.e. 65 for 2 1/2" and 70 for 2 3/4"; you should find those on the barrel flats also. Best having it well checked out before use. Lagopus.....