Guys,
The David Shaw gun is, or was, on display in the Heinz historical museum in Pittsburg. David was a resident on Hannastown, Westmoreland County, PA during the Rev War period. Although the gun has been restocked, it has a 48" oct-rnd smoothbore barrel of 14 bore. I once made my interpretation of what the David Shaw gun looked like when newly made; an English/Philadelphia style fowling gun, brass mounts, no patchbox or cheek piece.
Jim