some feedback I got from Turkey :
"most of these are from the first quarter of C 20th, Ottoman Turkish antique belt / sash dagger with unusual steel blade and horn handle.
Blade with a drooping curve in the mid and handle with two flaps at the finish makes the dagger different.
As it is stored and carried in the sash, it is called sash dagger."
although the above makes sense in its description, my doubts concern the lenght...* 18.5cm (7.1/4") in length... which would make it easy to drop out of a sash... in contradiction to the bichaqs which are twice as long and hence not easy to drop from a sash, piece of cloth, leather around the waiste...
Concerning the Black Sea Yataghan, the typicle Laz handle confuses me...as unlike other Yataghans, where you can find a dagger copy in the bichaq an kama's made , the Black Sea Yataghan has not...or at least I could not find a picture, with the exception of Surmene daggers...but they are not Laz ones
https://www.reddit.com/r/ArtefactPor..._used_by_19th/
https://www.youtube.com/watch?v=8DI6HH9iVxI