Pair of Central African knives

[Changdao]

Hello. As far as I know, the left piece is a typical Banda throwing knife. The early ones were fully functional, and very aerodinamic objets made for war. During the XXth century less functional versions (e.g. without edges) were made and their purpose shifted to a more ritualistic one.

The right piece looks to me like it is from the Yakoma or the Ngbandi, but I'm less sure about this one.