12 bore Percussion shotgun, Unknown Maker.  NSN.  Fair condition.  29” twist steel barrels have decent bores, nice old brown finish with some corrosion around breech area.  No visible proof marks and some soldering on underside of barrels.  Back action locks have a name that is unreadable.  Left side hammer has been repaired.  Stock has good finish and checkering with some handling dings.  Locks work OK.  A handsome old wall hanger - not a shooter.  Antique, can ship to your door.