Nice pieces, David. 
 
The one with the bulbous shaft is definitively from Northwestern Congo. These were found amongst several tribes, such as : Ngbandi, Bati, Benge, Poto, Ngombe, Gens d'Eau. 
Although I must say that the blade of this spear makes me think of another origin (So, Olombo and Lokele from Northeastern Congo). But it could well be that a Northeastern blade found its way to another area. 
 
The one with the slender blade looks Eastafrican to me. 
 
The third one is a bit of a puzzle. It has a strange blade. Did you buy these pieces ? If so, perhaps you could send some better pics when they arrive.
		 
		
		
		
		
		
		
		
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