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					Originally Posted by  Dave Noreen
					 
				 
				Those appear to be a new set of barrels with the 1910 bolt plate.  They have the V in a circle barrel steel mark.  A set of Vulcan Steel barrels of 1899/1900 vintage would have the K f barrel steel mark.  
 Attachment 127843
The V in a circle barrel steel mark generally begins appearing in the 135xxx serial number range about 1906.
 
Could you show us a picture of the left barrel flat and the legend on the top rib?  may give us some more information.  
			
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 Adding some pictures, I will have to take some more.