Rare knife from Congo

[Luc LEFEBVRE]

Well... Mbuun, Dzing, Yanzi & Lele are from the same stylistic area for these asymetric knives.
I have a bigger one from the Hungaan (see picture below).
Lew, the handle is made of wood in fact.
It is 42cm long.
Used for ???
I thought of a sculptor knife, but I don't think the handle is strong enough, I have to search...surely ceremonial with a such worked handle, but the blade is a good one.
Luc