This Winchester manufactured (trigger) guard is for the model 12 slide action shotgun in 12 gauge with a 2 3/4" chamber and is in very good condition exhibiting a mixture of thinning original blue finish and a grayish brown patina with some rust staining present. (file photo)

Note: Winchester model 12 slide action shotguns with the following gauges and serial numbers have been observed with this part:

12 Gauge: 318823, 588236, 870723, 899492, 933942, 1129908, 1385282, 1734902 & 1907555