Mysterious African "knife"

[Duccio]

Thanks, Tim
that they were both Africans I knew it, and I also knew that the second object is a recade from Benin.
I also imagine that the black knife is Congolese, but the question is: which of the many peoples of that area is attributable?
Do you have any relation with the Konda's prestige knives, even if the latter have completely "abstract" shapes and is this instead "figurative"?