Any idea on this.. maybe Jambiya?

[shortfoot]

Hello, first post. My brother in law has acquired this dagger. We have no idea how old the dagger is, or the worth of such an item. It has what looks to be a horn handle, as I can see no grains of wood. the sheath is definately wooden inside, with what looks like leather on the outside, all the silver looking metal is thin and all of the silver ropes are single strands wrapping around the sheath. Any information you folks could provide would be a great help. Thanks