Tim, 
 
If it's any help, the Atlatl seemed to die out in N America when the bow came into use, (with some overlap of course) but the bow has been used for 2,000 years. 
I think the hook part is too long and the way it is cut would weaken it as a spear -thrower, and then shaft looks thin for such a purpose as well. 
The carving and wood look African still to me, and the hair looks wiry, like from a cow tail rather than horse. (horse-hair often straight) 
Back -scratcher?? 
Of course, when you have it in hand you can judge better! 
 
Best, 
Richard.
		 
		
		
		
		
		
		
		
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