Hello Tim, 
 
I saw this swords with bovine horn guard in Maroua and Rhumsiki in the Extreme North Cameroon. 
The similar torques I have are allegedly from Lake Chad region and they were used as ceremonial means of payment, when the groom wanted to "buy" daughter of chieftain: He gave cattle to the cheeftain´s marshal and received the necklaces. then he brought the necklaces to the cheeftain and received the bride (cheeftain´s daughter). Cheeftain returned the necklaces back to marshal..... Nobody confirmed me this, just the selling person said (maybe fairy tale...) 
Regards, 
Martin
		 
		
		
		
			
		
		
		
		
		
		
		
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