seeking info on old shotgun

[joe sixgun]

I picked up a single shot 12 ga. this weekend and need help with identification. It has a damascus barrel, and is stamped
AM ARMS CO. BOSTON PAT.MAR. 21 1882. Serial # 31xx. The side plate on the action is removable and appears to be missing a lever on the left side as there is a square post that is threaded in the center like it held a safety or something. Any help on this would be greatly appreciated. Thanks in advance.

 

[macsters]

it was manufactured by American Arms...but you probably already knew that.

does it break open to the side? is the hammer exposed or internal?

 

[oneounceload]

With a damascus barrel, it will most likely make a nice wall hanger. It needs to be thoroughly checked by someone who really knows older damascus barreled guns before firing