Thank you Charles.   
 
Robert, I think that if it were for betel nut it would be much smaller, since most of the betel nut knives I have seen are small, much smaller.  However, this size and weight might indicate a ceremonial piece for sacrifice.  But this is just pure speculation.  I have seen others of later manufacture but the same region of the same size and are not for sacrifice.  I will therefore stick with the common usage for now.......
		 
		
		
		
		
		
		
		
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