Then I know which book you mean. 
I donīt think the hilts and the swords shown in this book is that close to 
Royīs chopper. 
In the Leiden collection there are 2 resembling swords found in Yamdena. 
But I havenīt seen any "closer resembling" Royīs blade- and hilt-wise in Leiden. 
On my later chopper I also suspect that itīs SE Sulawesi, both sheath and blade. 
 
Michael
		 
		
		
		
		
		
		
		
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