The Syrian Jambiya/Khanjar

[Atlantia]

This type of dagger is often referred to as 'Majdali Daggers' as they are most famously made in Majdal Shams (مجدل شمس) in the Golan Heights, although (as Dom says) I believe that there are other centres of production including most famously Damascus but also I believe elsewhere around the modern border of Israel.
Here are my best two. An almost identical pair in near mint condition.
I have never seen others with their original suspension sashes.
I've always thought that these are classic 'Majdali Daggers' (from Majdal Shams) and despite the swollen hilt normally seen on the Damascus ones I'd stick with that origin, Dom?:

Edit: because my writing this crossed over with Dom's post, so I'm integrating my answer for clarity.