NSN. Made in 1855. .58 caliber with a 12” barrel. The barrel and the lock have been cleaned but retain all of the markings. The door on the Maynard tape primer is a well-made replacement. This gun has an 1855 dated barrel and locks. The wood is good with some cracks. One split is in the middle of the wrist and two on left-hand side. The action works well.