Congo scarification knife... which Tribe?

[Flavio]

Hello, this is for sure a blade for scarification. Attached is a picture from Fischer/Zirngibl Afrikanishe Waffen were you can see a similar blade like the one of Katana. I have also a book in Italian where there is a very similar example and tomorrow i will post a picture (unfortunatly is only attribuited to Congo in general no tribe, but it was collected in 1907).