“Mystery” Four Blades Ceremonial Knife / Dagger

Four single edge blades mounted in crossed directions unto one wood handle. The blades are lightly engraved in a geometrical pattern,

We do not know for sure what is the origin and the purpose of this knife. Most probably a ceremonial device. We have heard various suggestions as to the origin and attribution:  Angola Chokwe, Congo Momvu, Nigeria Igbo and others.

Blades 6 1/2 inches. Total length 10 1/2 inches. Very good condition