IMO The sword (blade and hilt) is Caucasian. I have seen few twisted cores. I cannot understand from the photos if it is real twisted or etched. Only a close look can possibly tell.
But the scabbard is not from Caucasus. It could be from anywhere southern. Like Bulgaria, North Greece, Turkey or Syria.
IMO the scabbard is later addition on a fine kidjal.
I hope this helps.
BTW, I am glad to be here again after long time
