This Winchester manufactured unmarked adjusting sleeve is for the model 12 slide action shotgun and is in very good condition with light 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: 588236, 933942, 1129908, 1385282, 1734902 & 1907555

Note: the part that was removed from serial # 1907555 has a partially visible "B" stamped along the raised radius.