Age and origin of Jambiya ?

[happybrontosaur]

Hello,
I'm new to this forum and interested in the subject of ancient weapons, so thanks for letting me in.
In the early nineties, I acquired a dagger (jambiya) from the Emirates (?)
As the person who gave it to me already deceased long time ago I cannot ask it to him anymore.
Can somebody tell me what kind of weapon it is and what the origin is ?
I enclosed some photo's.
Any info on this object is very welcome.
Thanks a lot !
Steven