I haven't got a clue...but it's definitively African !

[katana]

Hi Freddy,
it could be some kind of 'war hammer', similar to the weapon used in Europe, however the handle would be longer and the head heavier.
If it is a 'war hammer'....I would think that yours...being fairly ornate...is probably ceremonial. Still, if used ...would certainly give you a 'splitting' head ache....