Thank you Kai for your kind message ! 
The infos are really helpful ! 
 
For the brass(?) 3+ crowns,  
I just wonder if the all gold mounted multi crowns sikin panjangs were just ceremonials weapons ( with the ivory scabbard...) 
 
and the brass mounted, less soft than gold , for ''real battle weapons'' 
as the samuraïs did when they alternate the koshirae on their swords  
between battle/ceremonial  
 
I read too about suasa gold and the islamic position about to much gold on weapons, maybe there is a clue here ?...
		 
		
		
		
		
		
		
		
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