It is not of course a definite answer but when you consider all the examples coming from Greek region of the Ottoman Empire this Yatagan is indeed Greek in origin. Of course the maker and owner was probably Ottoman Turkish.
The handle on the other hand is a obviously a more recent replacement to the lost silver niello handle. There is no discussion there. And the ha Dule is rather made just for practical purposes and looks hideous in my opinion
but they probably just wanted to save the nice blade and keep using it. Or someone made ten handle so they can sell the blade because without a handle itís usually worthless.
I am also surprised how all the respected and valued veteran members here easily get mad and argue for such a petty topic
these swords were sold and traveled across continents along with genre owners initially and later with trades and auctions. I bought a Laz Yatagan from Australia imagine that