I think what you have there is a Darra gun. In the Khyber Pass region of Pakistan there is a town called Darra Adam Khel. Since the 1890's the people there, Afridi tribesmen of the Adam Khel clan, have built guns by hand in crude workshops. The story is that given a gun they have never seen before, they can turn out a serviceable copy in about ten days. The area is closed now to foreigners, for security reasons, but time was you could go to the market there and buy copies of all sorts of guns, with quality ranging from very good to pretty crude. I used to own a copy of an English large bore musket that according to the paperwork that came with it, was made there in the 1950's. If you took the lock off and looked at the inside of it, it was pretty clear the lockplate and internal parts were hand filed. The lockplate was stamped with a date and some random lines of letters meant to represent whatever the stamping was on the lock they copied. The stock was a pretty nice piece of wood with a lacquer finish that was crazing similar to yours. Why would I guess yours might also be a Darra gun? The checkering on the bolt release and the grooves on the cocking knob look hand filed and not a particularly good job of it, the "engraving" the same way, no maker's mark on the action or barrel-instead some marks that also look hand done and sort of suggest letters, the "gunmaker's" stamp-you would think someone with the skills and tooling to chamber a firearm would be able to stamp their name in a straight line. Just my thoughts, and I may be way off base here.
