Manufactured in 1870 as a third model with the serial number stamped in block numerals behind the trigger. The barrel is equipped with dovetail blade and folding ladder rear (missing elevation bar) sights and is stamped with the two-line address/patent dates marking. The bolt remains in its original .44 rimfire configuration. There are sling swivels present on the forend cap and buttstock. The straight grip stock is fitted with a trapdoor buttplate. Comes with a four piece cleaning rod. The '66 secured Winchester's place in the annals of the West and launched a long line of successful Winchester lever actions that remain popular to this day and still retain the basic form of the '66.