Michael, 
 
Justin gave the right answer. It is a balinese golok. 
Stone shows a similar piece with a different hilt. 
 
I had the honour to admire and hold one with a polychrome painted sheath and same hilt like this one in the collection of a member of Tammens study group that Tammens mentioned in his books.
		 
		
		
		
		
		
		
		
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