Hello,
Thank you all for your precisions/ precious informations and comments,
I was not that wrong with my estimation between WW1 and WW2
Thank's a lot for the translation !!
I'll post close pictures of the ''ivory'' ''Bone'' hilt maybe it can help to fix it.
For the final tip I'll find a small ivory or bone ball to set,
I saw some kindjal with such a piece...
Kind regards