I have frequently noticed the feature of holes, usually filled with iron, in the forte of Indian blades and I have several examples with this feature, including an example with an old European blade. 
 
I have assumed these often represent artifacts of previous mountings but I also wonder if sometimes they may have been placed to suggest a blade was an heirloom, even when it was not.
		 
		
		
		
		
		
		
		
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