African dagger. Completely stumped

[blue lander]

I spent an afternoon looking through photos on the forum and I still have no idea what this one is. The seller thinks it's North African but it doesn't look very North African to me. He says the hilt is bone. The hilt shape reminds me a bit of the bayonet clone in this thread but the blade of course is completely different.

It hasn't arrived yet but once it does I'll take better pictures.