The Winchester Model 12 and Model 97 trench shotguns were the primary U.S. combat shotguns used in World War II and Korea and even into Vietnam by both the U.S. Marine Corps and Army. Original, unaltered World War II factory parkerized examples are extremely rare today given almost all were rebuilt over time. The barrel is roll stamped with the two line Winchester address/patent dates followed by "-WINCHESTER-/-TRADE MARK-" and "MODEL 12-12 GA.-2 3/4 CHAM./CYL." The top breech end of the barrel has a small flaming bomb insignia and the bottom is "43" dated. Both the barrel and front edge of the receiver are stamped with the circled Winchester "WP" factory proof mark. The right of the receiver is also roll stamped with "U.S." and the flaming bomb insignia. Correctly fitted with the World War II pattern four-hole heat shield with "W" marked bayonet lug, pistol grip walnut stock and serrated pump handle, and the left of the stock is stamped with the boxed Ordnance "G.H.D." inspection mark above a small 1/4 inch crossed cannons cartouche, with a checkered hard rubber buttplate with the circular Winchester logo. The stock has a sling swivel and the larger bail wire sling swivel located on the bayonet lug. The matching serial number is roll stamped on the underside of the barrel extension and receiver. Includes a Commercial Winchester Model 1917 bayonet with olive drab green plastic scabbard, a nylon sling, and a "1943" dated U.S. tan canvas ammunition pouch.