Hi detlef, 
 
Yes indeed yours was also double-edged. 
 
I was in the thinking that mine could be something from the Phillipines, as I never saw anything like this. Now I've seen yours and somewhere back I think Artzi has sold one of the likes (pix). 
 
It was etched via the coconut juice way and I've failed to see any traces of pamor there on my piece.
		 
		
		
		
			
		
		
		
		
		
		
		
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