500.00 Reduced again - Winchester Model 12 12G shotgun Ref #1023 Medicine Hat May 3, 2024 - 3:31 PM Estate Firearms Winchester Model 12 12G shotgun Reference #1023 Offers considered, no trades. Winchester Model 12 - 12 gauge shotgun has a 30" barrel, 2¾" shotshell, full choke. Dated 1955.