Neither this forum or anyone else can tell you what you have, with the scant info you have posted. If you want to post all the letters, numbers and symbols found on the gun, inside and out, well try to help. Photos will help. You could have a William Powell and Son, >410 bore, sidelock, worth $20.000 or a P. Powell, 12 bore, worth $100.. Bushrod
The shotgun appears to be a 20 gauge side by side. The links below are for five pictures of the gun. I tried to place the pictures directly in the posting but was not able to. Any help would be appreciated. Thanks
It appeas to me to be a 12 bore or possibly a tight choked 10 bore... There is more info on the gun than you're posting.. The proof marks are on the frame and the bottom of the barrel, where it rests on th frame.. this appears to be an English gun anmd thesemarks are important.. Also, mre lettering on the barrel rib..Bushrod
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