This excellent original Winchester Model 1866 Lever Action Rifle was manufactured in 1869, and has the Third Model features which include receiver with less drop ahead of the hammer and external serial number stamped in block numerals on the lower tang behind the trigger. The receiver has the single upper tang screw and flare at the junction with the forearm introduced on Second Model 1866 rifles. Special order sling swivels are present on the forearm cap and stock. The full octagon barrel has a brass front sight blade and Henry style folding leaf rear sight. The rear sight has a 900 yard center notch with slide stop screw below the notch. The brass forearm cap is the first pattern with retaining screw that passes through the lower portion of the barrel. The receiver has an indented loading port cover retained by a single screw. The hammer spur has borderless hand cut knurling. The brass crescent buttplate has a hinged trapdoor. The top barrel flat 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" in serif letters ahead of the rear sight. The serial number is stamped in block letters on the lower tang behind the trigger. A "B" inspection mark is stamped behind the serial number. The rifle has the distinctive brass receiver, forearm cap and crescent buttplate. The barrel, magazine and sling swivels are blue. The loading port cover is a fiery niter blue. The hammer, trigger and lever are color casehardened. The stock and forearm are oil finished, straight grain, American walnut.