The pics tell very clearly Paul. 
 
I would definitely accept this blade as stylistically Tuban. 
 
Quite unusual I think. I cannot recall seeing a Tuban blade with manipulated pamor. 
 
The details appear pretty crisp do we know where this has been? 
 
Reason I ask is because we expect Tuban blades to be old, rather than young, but if this went to Europe a two or three hundred years ago, it could well look like this
		 
		
		
		
		
		
		
		
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