In my dilettante opinion, the entire wide part of the blade below the gangja was formed from a separate piece and the original blade was inserted and forged there. 
If that was the case, I see no reason to see the holes in the original blade.  No? 
 
Also, I do not see the bracket; rather, it is a fuller, and it stops suddenly ~ 1/5 of the way from the gangya. That's one of the reasons I suggest the existence of a separate thick piece where the blade was inserted.
		 
		
		
		
		
		
		
		
		
			
				  
				
					
						Last edited by ariel; 25th December 2012 at 03:38 PM.
					
					
				
			
		
		
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