A nice clean-up job.  
 
It's difficult to say how old a blade is exactly. Old blades can look new, and new blades can look old. A lot of it depends on maintenance and climate.  
 
Some other members may be able to contribute more on the age of this particular keris. Personally I would think it has some age to it considering it's somewhat weathered features.
		 
		
		
		
		
		
		
		
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