Hi John, 
 
two very nice keris you have there, agree with the others about the origin. But like David I don't see any need to stain both blades. The second blade you can try to stain it with hot vinegar but I doubt that there will be seen a similar pamor like by the first one. The blade is very very nice, just stunning. I have a Palembang keris with a similar handle like yours, at weekend I will post some pictures. But yours is much better.  
 
Regards, 
 
Detlef
		 
		
		
		
		
		
		
		
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