A Saturday afternoon African riddle

[Iain]

For those that like African things... I'll give a hint - it's not East or N. African.

Obviously a long way to go on rust removal and restoration, this thing has a very crusty and deep reddish patina and corrosion on the iron blade. The hilt is solid bronze and heavily blackened from use and probably smoke. I ran out of oil and a few other cleaning materials this afternoon so I thought why not take a break, throw it up here and see if anyone can guess what it is.