Thank you for the input folks. 
 
In the hand it does seem to be a european blade - very consistent in construction.  But of course difficult to attribute as there are no markings. 
 
I actually have pictures of another pata which seem to show a single-edge blade, but I'm afraid I can't show them as they're from a sale item on a dealer's page. 
 
Once the sale is made I shall post them for comment. 
 
Thanks again.
		 
		
		
		
		
		
		
		
	 |