I also wonder if the grip wrap is a later replacement, though not as sure.   
 
Yes wealthy non-datu warriors can have such pieces made as long as they do not do showy fittings above their station. 
 
As far as tribe is concerned, I would say at least the blade is Maguindanao (and possibly the scabbard as well).
		 
		
		
		
		
		
		
		
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