Late production Winchester Fourth Model 1866 rifle manufactured in 1885. The rifle has a round barrel with full-length magazine. The barrel has a standard sporting style front sight with nickel-silver blade and a sporting style rear sight. The upper tang of the distinctive brass receiver is factory drilled and tapped for a rear sight. The straight grain, American walnut stock has the late, steel, crescent buttplate with sliding brass trapdoor. The under side of the stock is fitted with a sling swivel. The top of the barrel is roll-stamped with the two-line legend "WINCHESTER' S-REPEATING-ARMS. NEW HAVEN. CT./KING'S-IMPROVEMENT-PATENTED-MARCH 29.1866, OCTOBER 16, 1860" ahead of the rear sight. The serial number "164357" is stamped in script numerals on the lower tang between the lever latch and the rear tang screw.