I had this one for quite some time. It's weird and has a very 'aggressive' look to it.
I like it because it's peculiar.
I think it's Congolese as the handle states 'YAKA', which is the name of a tribe. The knife or dagger consists of an aluminium handle to which a copper blade has been added. The blade itself looks like some of the barbed spearheads I've seen from Congo (or neighbouring countries).
It comes with a wooden sheath which has been covered with some kind of leather. The sheath is worn, so I think this piece has some age.
Total lenght : 25 cm.
Just look at the pics and judge for yourself