This U.S. contract Winchester Model 12 Trench Gun was manufactured c. 1944. This shotgun has the rare combination of blued and parkerized components and was manufactured during the brief transitional period before Model 12 Trench Guns were fully parkerized. The receiver has the late finish with prominent milling marks found on parkerized Model 12 Trench Guns. The receiver, trigger guard, barrel and six hole handguard/bayonet lug all have the Winchester wartime parkerized finish. The action slide bar, magazine tube, action slide tube and sleeve, trigger, safety, slide lock, lower sling swivel and screws have the Winchester commercial blue finish found on Model 12 Trench Guns below serial number 103000. The bolt is bright. The forearm and stock are straight grain American walnut with the commercial varnished finish used on most blued Winchester Model 12 Trench Guns; late production parkerized Model 12 Trench Guns usually had a military style oil finish on the stock and forearm. The stock has a black, checkered, hard rubber buttplate embossed with the Winchester Repeating Arms logo. The right side of the receiver is stamped "U.S." followed by the Ordnance "Shell & Flame" insignia below the ejection port. A "Shell & Flame" insignia is also stamped on the top of the barrel. The left side of the stock is stamped with the Ordnance "G.H.D." final inspection mark enclosed in a rectangle above a small Ordnance Corps escutcheon. The left side of the barrel is roll-stamped with the two-line Winchester legend which is partially covered by the handguard followed by "-WINCHESTER-/-TRADE MARK-" in two lines and "MODEL 12-12 GA.-2 3/4 CHAM./CYL.". The underside of the barrel is stamped with the date of manufacturer "44". The oval Winchester "W/P" proof mark is stamped on the top of the barrel and receiver. The left side of the bayonet lug is stamped with the Winchester "W" code. The serial number is stamped across the bottom of the receiver ahead of the loading port and on the bottom of the receiver extension. The shotgun is fitted with a post-war web sling marked: "MRT 5/53".