Perhaps a small contribution….
Found some topics containing “ turkish ribbon” in this forum from quite some years ago
http://www.vikingsword.com/vb/showthread.php?t=20828
https://www.vikingsword.com/vb/showthread.php?p=168074
And a youtube vid, although Zeybek, it mentions the ribbon as well
https://www.vikingsword.com/vb/showthread.php?p=168074
An interesting item is the difference width’s of the yataghans pictures placed by TVV:
Some do look like the “standard” yataghan, whilst others seem to have a bigger “belly” close to the point.
I have no idea why or what the advantage or purpose of that would be for the weapon:
Does any of you know…?