Is it a katar dagger ?

[francantolin]

Hello,
Thank you all !! ,
interesting comment about whale blubber ( I didn't know these kind of knives-tools )
Yes the blade is pretty thick with diamond profile,
made for cut and stab like a spear head, but seems really not easy to use !
not well balanced at all, the tip is heavy.
It could be used making large circles moves / dance ? )
( Maybe an early ritual-votive weapon ? )