I don't know much about spears, especially not about African ones but the one in question shows a very different quality as the other shown ones.  
I had some antique Maasai spears, the description of the three segments point to a origin like suggested, but the tip looks different. 
Ed, can you show more from the spear? Haft and butt? 
 
Regards, 
Detlef
		 
		
		
		
		
		
		
		
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