Hi,
I agree with Flavio the colored pic's are a mix of all Kuba and other tribe arms,headdresses and etno....festival
The 1956 pic is from the Pyaang....
The pic with scabbard is not Luba but Kete,they have the same handle but I'm sure the blade ends on 3 points not one
I added some Kuba knives to show what I mean...
