Interesting. The first thing that crossed my mind was that the spearhead and small barbs along the shaft of the spear head looked very much like the ones I saw carried by the Tubu in Chad. Which isn't far off from where you mention it's from. I'm not suprised that they are simular.

I still kick myself for not trading with a local to aquire his spear while travelling thru Chad...

You certainly have a cool spear there, and it sounds like you have a lot of other neat ones too!