Sorry, can't help with the wasp - but I agree it does not look native applied to me, and I guess has managed to remain in good condition because its in the fuller. 
 
I'm not sure (unless the steel is poor quality?) that a subcontracted or minor maker necessarily is the cause for the poor finishing. Its likely this had a ricasso at some time and the sharpening and local preparing probably is the cause of the less than perfect appearence.  
 
Next post has details of my flex test.
		 
		
		
		
		
		
		
		
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