Hi- New to this forum. This is the only muzzle loader I own. It seems from what I have read that most blubderbusses were made in Europe. This one is clearly American with an inscribed eagle and a stars and stripes banner. The initials appear to be “PH” on the top line, then below it a mark I can’t make out (letter or not) a space, then “DEOP”. Thanks for your time and expertise.