Tom I do like your gun.
Here is a 21 Winchester similar to your gun. Gun was made in 1933 and lettered as a tournament grade 2 barrel set with odd chokes on the 30 In. barrels. Gun was built with a round action, and straight stock. Gun has no markings on the floor plate. Also the point of impact for the 30 IN. barrels was ((to shoot high)) , which they do shoot high. Gun also has much history with Abercrombie and Fitch, and was a New York gun for most of its life. I have looked at a few 21s and owned some, but I'am confused on much of the things that surround the 21 Winchesters. Maybe our man Murph, and Reseacher will give us their opinion on the two barrel sets from Winchester. How common, barrel lengths, chokes, Sights , another options. I think the 21 Winchesters were made to shoot, but that is just my opinion.
David
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I think the checkering is 28 or 30 Lines per Inch. (( Maybe))