.58 caliber. 32" pinned three-state octagon to round barrel. SN: NSN. Round tailed percussion lock marked with the "{Tombstone Fox/EB}" Hudson's Bay Company trademark forward of the hammer and in four lines at the tail "PARKER, FIELD/& Co/1875/LONDON" with the lower two lines encircling the center two. Traces of the "{Tombstone Fox/EB}" mark appear on the top flat of the barrel. Traditional Northwest Trade Gun features include the three-screw brass serpentine side plate, raised carved moldings around the tang and at the tail of the lock mortise and counterpane, oversized iron triggerguard, plain brass buttplate and corrugated brass ramrod thimbles. Includes an old wood ramrod. A solid example of a latter day percussion trade gun produced the year before the Battle of the Little Bighorn. While folklore and Hollywood would tend to make the average person think the majority of the Sioux and Cheyenne at the battle were armed with repeating arms like the Henry, and Winchester models 1866 and 1873, trade guns like these were likely some of the most common guns to see use that day by the native combatants.