just a tourist greek-ottoman dagger ?

[Kubur]

Originally Posted by francantolin

are makers marks with drop shape only from Istanbul or Turkey ?

No of course, many yataghans from the Balkans have them.
Your stamp looks like
but just looks like, your stamp is bigger and less deep than real stamps.
Look at your sheat, the mounts are moulded
its a nice old touristic object, and very decorative