This had to come home with me. Yes, a blunderbuss!
Now I certainly don't think this is an actual antique piece, but it looks to be a pretty old repro. Took it apart earlier, no markings anywhere behind the lock or under the barrel. So I have no idea where this was made. Im guessing Spanish. However, the engraving on top shows a cross and orb(?) over a box with 'ARI(?) over something else. No idea. But a really neat little 'buss. Have a look!