Interesting Kaskara from the Askeri Museum

[TVV]

When visiting the Askeri Museum a few weeks ago, I found this sword. The museum claims that it is a Byzantine 15th century sword, which it most definitely is not. As a rule, the curators in the Askeri never really cared about proper attribution, so the misattribution is not surprising.

To me, it looks like a kaskara, potentially an earlier one and with an interesting silver hilt. I wonder of anyone is familiar with the markings in the base of the blade.