Khanjar in unlikely plain silver mounts

[Lee]

The mounts are good solid silver with some rubbed hallmarks of European appearance - hopefully someone here will recognize them. I have the sense that this was mounted for "concealed carry." The sheath and hilt have a simple locking mechanism and a small pin must be pressed on both sides to unsheath the blade. It appears that a loop on the opposite side of the sheath has been lost.

I'm interested in opinions on the origin of both the blade and the mounts.