Welcome to the forum! 
 
This seems to be an old pedang blade; possibly pamor adeg - sharper pics would help to confirm.   
 
The scabbard and the hilt are a more recent addition - pretty much the same concept as with Japanese storage scabbards. Thus, not that much of a loss. 
 
The value certainly is in the blade and pics will help to address quality as well as suitable strategies for improved staining.  
 
Regards, 
Kai
		 
		
		
		
		
		
		
		
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