African double pointed Lance head

[junker]

Hi,

this is my latest aquirement.

A lance head with a double point.
I guess for fishing, if no member has another idea.

It should came from africa, as the seller told, but I dont know the region or tribe and is surely more than 70 years old.

The red Lines on it are a kind of file work which became a light rusty.
Should i clean it ? It will became a black and white/metal outfit.