This exceptional Winchester Model 1897 trench shotgun is right at the top of the approximate known serial range E613000-E705000 of World War I era military issued shotguns. The Winchester 1897 was one of John Browning's many contributions to American sporting and combat arms, and in both the "trench" and "riot" configurations performed fine service for military and law enforcement users, seeing action as early as 1899 in the Philippines, and earning particular fame in World War I and World War II for its potent close range firepower along with its slamfire capability. Features a six-hole handguard/bayonet adapter with "PAT. JAN. 15 & MAR. 19. 1918" marked on the left. The barrel protrudes 1/2 inch ahead of the bayonet adapter, which is considered correct for a World War I era Winchester 1897 trench shotgun. Receiver and cylinder choke marked barrel both stamped with a circled Winchester "WP" proof at the breech. The slide bar has the model and trademark information. Grooved forearm and smooth pistol grip stock with correct first type comb and a Winchester branded checkered hard rubber buttplate. Length of pull is 13 3/4 inches. Reference page 50 of Bruce Canfield's book "Complete Guide to United States Military Combat Shotguns" for information on World War I era Winchester Model 1897 trench shotguns.