RDGAC, 
 
I am sure you are right on this, as both have the mk3 ectractor. 
I don't know what I was thinking, as I know the opposed arrows are the sold out of service mark! 
Thank you! 
BTW, I see you are from York,  I wasn't too far from you,...near Ormesby...Middlesbrough  area. 
 Alberta now... 
More pics tomorrow, took some & left camera in workshop... 
 
Richard.
		 
		
		
		
		
		
		
		
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