Hello Artzi,
Have located 30-40 kilij sword with long inscriptions on the blade, the majority of these were done with the square kufic calligraphy. Most are not dated but some also have the name of the current ownt and when Sultan or Shah the time period of that hilting can be established.
The blades that a date can be determined are from early 16th century to the 19th century, with the majorty usung the suare kufic script.
This yataghan form a private collection I have permission to show:
http://turkishyatghan2.blogspot.com/
The gold is inlay, believe it to be with the Turkish techinque of a triangular punch overlay and then the gold applied.
The calligraphy has a similar vertical line, also the slanted accent marks, but no diamond shaped dots. Your kilij's calligraphy had the diamond shaped dots. So we have similarities and dis-similarities between these two examples. Look carefully at the signature on the yataghan...
The great majority of calligraphy I find on 16th century Turkisih kilijs has the square kufic script.
rand