Forgot about this one; it came into my hands separately.  My father picked it up for me at a little antique shop in Northern California, where it was labelled a 'salmon fishing spear'.  I didn't know they had salmon runs in the Sudan!?! 
 
8 1/2" long with an almost black patina, and the little barbs are damned near as sharp as the day they were forged.  Shaft is a replacement piece of bamboo I happened to have lying around, good to hear it's appropriate to the piece....