Cutts Compensator's were made by Lyman and sold after market by gun shops...the barrels of the recipient guns were usually not marked with anything....just a local gun shop installation, saw and add......Lyman did a great marketing job here and many shooters had these things added...to all kinds of guns....just think how many fine barrels were ruined.....so your model 12 probably has been cut and then re-cut to remove the Cutts Compensator.....or it is a mail order short barrel from Winchester.........Poly choke was the after market competitor of Cutts....and just as junky....
