This rifle was manufactured in 1843 by Henry Deringer of pocket pistol fame. Reportedly, 13,000 of these rifles were manufactured by Henry Deringer between 1817 and the early 1840s out of a total of approximately 38,200 manufactured by various contractors. These arms are among the first widely issued rifled firearms used by any military and saw use in the Seminole Wars, Mexican-American War and Civil War. Blade and notch sights, "US/DERINGER/PHILA" marked center of lock with restamped "1843" date at the tail, "MS" (State of Massachusetts) marked on top of the breech along with "US/AH/P", "MS" is repeated on top of the stock wrist, an oval script inspection cartouche stamped on the left stock flat.