Manufactured in 1870 as a third model with the serial number stamped in block numerals behind the trigger. The barrel has the two-line Winchester address/King patent dates legend ahead of the rear sight. The sights consists of a blade integral to the front barrel band and two leaf rear sight. The left side of the brass receiver is period hand marked "JW Cope/1870" and has a saddle ring. The bolt remains in its original rimfire configuration. The carbine stock is fitted with a trapdoor brass 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.