I have a thing for old warriors too. My vote would would be to do what you can. I think I have one that is quite similar. I've always loved the balance. The blade flattens ever so slightly in the belly. I think either due to a lot of sharpening or an old repair, similar to yours.  
Cheers
		 
		
		
		
			
		
		
		
		
		
		
		
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