Three dots
			 
			 
			
		
		
		
			
			I have a Syrian dagger with the three dot inlay in copper, in addition to two teardrops in yellow metal and two plain large dots in copper, all arranged symetricaly down the blade . They could have a meaning, but then again, they could be just simple decoration.  
 I think in some cases, a single nail/rivit at random, they are just a way of hiding a flaw in the blade.
		 
		
		
		
		
		
		
		
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