Yeah, I agree that this is a borderline case because of the pamor kelengan and just a pamor motif on the other side, and tangkis is a javanese name AFAIK. The odd pamor motif seems original and not accidental from the pictures, but a closer inspection could reveal the contrary. The blade looks original and old. 
Regards
		 
		
		
		
		
		
		
		
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