This Winchester manufactured barrel chamber ring screw is for the model 12 slide action shotgun and is in very good condition with light slot wear. (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

16 Gauge: 94168, 712401, 808640, 1116030 & 1677926

20 Gauge: 22372, 37014 & 122475