This Winchester manufactured 30" vent rib barrel with a fixed Improved Modified Trap choke and a bright, excellent bore is for the Super X Model 1 semi-auto shotgun in 12 gauge with a 2 3/4" chamber and features a mid length bead and the ejector.  The overall condition is very good with a thin matte blue finish added over the original high luster blue finish. We are thinking that this was to reduce any glare that the original finish might have caused for the shooter.  (file photo)