Your gun is recorded in the Serialization Book, a fairly accurate reference, as a 30" gun with automatic ejectors. The automatic ejectors, if they are actually present in your gun. would add serious value. The fact that your gun may be "sawed off" would detract from its value more so. Pictures of your open gun at the breech would clear up the ejectors business. Pictures of the top of your barrels at the muzzle may clear up the "sawed off" business. That being said, if the picture of the rib at the muzzles does not solve the mystery, an accurate measurement of the bores and choke area would clear that up.
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