To keep a more narrow focus lets just stick to etched thuluth where ever from.  I have seen some on Indonesia weapons. 
 
These are the three examples I have.  I am not an expert but I thick it is possible to see three diferent styles, certainly two.  Are they indicative of differnt regions?  Clearly different manufatures.  Crocodle skin in not a pointer as the Niger has crocs.
		 
		
		
		
			
		
		
		
		
		
		
		
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