Interested Party,
Seems to me that the spine of the terminal third of the blade is tilting down just a little, and the edge follows the same direction. Of course, physical examination of the dagger itself would be much more informative.
As to the consequences of the “ heavy use”, that can be confirmed ( or rejected) through measurements of the width of the blade at different points.
But in general, there is an uncanny resemblance of that and mine “ qaddaras” ( for want of a better word). It suggests that it was a general, albeit extremely rare, subtype rather than sporadic improvisation by an isolated master.
And of course the inscriptions might be of crucial importance.
While the existing contour and decorations do suggest Persian provenance, as a rule Persian blades had no fullers, while Turkish Surmenes had a very elaborate system of those.
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