That was exactly the reason why I asked the question about rust/ patina.  
Having seen quite few of such katars, I  would not be so categorical about calling them fake. Just low-level, worn-out , but genuinely old junky katars.  
 
As to the patas.... When did they start using screws from Home Depot  in India?:-)
		 
		
		
		
		
		
		
		
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