I think it's from Pangasinan. 
 
I have this blade, which I'm told is called a "pangaw-at" with similar hilt and scabbard, that I'm told is from Pangasinan. Mine has peened tang (and a carabao horn hilt, as is typical for Luzon) and I suspect yours does too. 
 
Also I think I can see teeny bit of the tang in your last photo. 
 
Thanks, 
Leif
		 
		
		
		
			
		
		
		
		
		
		
		
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