I am looking at the blade not the hilt.  The hilt I have even seen on Sulu pieces.  ON the blade I am looking at primarily the front of the ganga area.  You can check Cato for some of these, and I make the distinction between Maranao and Maguindanao. 
 
There are other things on hilts that can help, especially the okir/okkil work done that can distinguish tribal areas.
		 
		
		
		
		
		
		
		
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