Winchester Third Model 1866 Musket manufactured in 1869. The musket has a round barrel with 3/4 length magazine and three barrel bands. The upper barrel band has a lug for a saber bayonet. The barrel has an iron stud front sight and folding leaf rear sight. Sling swivels are located on the middle barrel band and stock. The stock has a brass, carbine style, buttplate with sliding butt trap. The forearm and stock are oil-finished walnut. The third model brass frame has the serial number, "42310" stamped on the lower tang behind the trigger.