The pistol looks Balkan or Turkish to me... Greece, Macedonia, the Agean shore of Turkey etc. Flintlocks hung on a long time there, well into the 20th century because the Ottoman Government resisted allowing the locals being armed with anything newer. I'd guess its between 1800 and 1840 even though the lock shape suggests a date in the late 17th-early 18th century. But, that is a pure guess. These areas were strongly influenced by the styles of the first European arms they received and preserved the forms until the very end, long after they were out of style in Europe. North African snaphaunce locks are another similar example.
Huge numbers of "tourist junk" pistols were and are still being made in that area so its hard to tell from the pictures if this is a real one or a decorative one. I think its a real one. The late Robt. Ables, Theodore Dexter and others often had them in their catalogs so it could have been sold here anytime from the mid-20s on. Its not terribly valuable, maybe a few hundred dollars but that only if you can find a buyer. They were considered exotic in the early days of collecting and brought more money then they do now. I don't think there are any serious collectors of them. So little is known about them and there was so much pure junk mixed in that there is very little interest in them.