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					Originally Posted by Matchlock
					
				 
				Hi Marcus, 
On the underside of the rear barrel base there ought to be (or may be missing) a round loop for a transversal stock pin; the other, forward pin went thru the hole in the hook. 
Best, 
Michael 
			
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 As there obviously was no side view provided by the auction house I cannot tell whether the rear loop is still there or not.
What date was that Bonhams sale? That barrel is mid-16th c., possibly Italian or French, the dovetailed pan is missing.
Best,
m