The only marking found on this interesting breech loading rifle is "2140" stamped in the stock on the top of the wrist. The general profile has a New York style. The octagon to round barrel has a post front sight and a second post on the breech section. A rear sight groove is cut into the rotating breech. The nipple is used to rotate the breech counter clockwise 1/4 turn for reloading. This brings the chamber opening to the left side of the frame and also keeps the nipple out of alignment with the hammer until the chamber is back in alignment with the barrel. The slab sided stock has a crescent steel buttplate.