qsy-complains-a-lot:

Algerian Moukhala musket

Manufactured most likely in Kabylie, Algeria c.1760′s.
~.60 caliber, ~140cm long smoothbore steel barrel, Arab miquelet lock, silver fittings with coral inlays.

Made for a diplomatic gift from the Bey of Algiers to the future king Georges IV in 1811. The Berber people of Kabylie were known to make these very long muskets, much in the same way the Afghans manufactured their jezails.