Hello dear members,
I finally got it ! ( I only had the seller pictures thats why I couldn't post more before)
The blade seems good and not recent work with what seems to me a large enough diamond section piercing mail tip.
Strange global shape indeed ,what I found interesting ,
For the inscriptions/engravings,
They are of better quality than I thought: deeply and finely engraved; I show them to a friend who read and makes arabic calligraphy and he couldn't translate the cartouche so maybe is it in afghan/ farsi ?
The scabbard sure, is a later ''invention''

Made of three part of what I think was a
bayonett or cutlass scabbard ( old european model ?)
So maybe all is an afghan mix ?