Thank you all for your messages and sorry for the late reply.
Thank you Ed for the five-khemsa esoteric or muslim symbol and a possible sudanese origin.
Yes Motan , I wrote ostrich- royal.crane on my first message, I saw what seems to be a stylized ''crown'' around the head .
Just an idea : the blade of these large takoubas and especially the tip looks like an ostrich beak
Massive ( 1,1 kg sword without scabbard ) unsharpened and large 15 first centimeters but then razorblade sharp utilise the tip,
Efficient ike an ostrich attack !