This is an excellent example of a rare, late WWII, all parkerized Winchester Model 12 Trench Gun manufactured in 1944-45. The Winchester Model 12 and Model 97 Trench Guns were the primary U.S. combat shotguns used in WWII and Korea and even into Vietnam by both the Marine Corps and US Army. Consequently, original, unaltered WWII examples are extremely rare today given almost all were rebuilt and reparkerized over time. The left side of 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 is stamped with a small Ordnance Dept. "Shell and Flame" insignia, and both the barrel and front edge of the receiver are stamped with the circled Winchester "WP" factory proofmark. The right front end of the receiver is also roll stamped with the Ordnance "Shell and Flame insignia/U.S." This shotgun is fitted with a walnut stock and pump handle, and the left side of the stock is stamped with the boxed Ordnance "G.H.D." inspection mark and a small 1/4 inch U.S. Ordnance Escutcheon stamped below that. The serial number, "1033927", is roll stamped on the underside of the barrel extension and receiver. The walnut stock and forearm have a varnish finish with the black checkered hard rubber buttplate with the circular Winchester logo. The shotgun is fitted with the WWII pattern four hole, parkerized heat shield/bayonet lug. The stock has a sling swivel and the larger bail wire sling swivel located on the bayonet lug and is complete with a late WWII, unmarked green canvas sling.

Excellent with 97% plus of the WWII late gray parkerized finish, very minor edge and high spot wear overall, and some finish loss on the magazine tube and pump handle slide. The bolt and lifter still retain their original Winchester factory "in the white" polished finish. The stock and forend are also in excellent condition with a clear sharp boxed cartouche and ordnance proof on the left side and show only very minor handling marks in a few places. An exceptionally nice, high condition late WWII trenchgun.