.69 caliber. 42" rifled barrel secured by three flat, spring retained bands. NSN. Bright finish, iron furniture, walnut stock. Lock marked REMINGTON'S/ILION, NY/1857/US in four vertical lines at tail. Tang of patent breech dated 1857, and with the bayonet mating code I/B/74. Counterpane with visible script cartouches, the ET of Springfield inspector Elisha Tobey and the PH/3 of Ordnance Officer Peter Hagner who was part of the 1840s re-inspection team of Ordnance personnel inventorying and categorizing flint muskets in inventory. A script JS final inspection cartouche from Springfield Arsenal's Master Armorer John Stebbins is present behind the triggerguard. Rifled bore and upgraded with a US 1855 pattern long range rear sight and a steel blade front sight. Maynard priming system remain compete and intact. Retains both sling swivels and the full-length button head ramrod that is correctly dished for use with elongated ball ammunition. The musket is one of the US 1816 pattern muskets altered to percussion with a patent breech and the Maynard automated priming system at Frankford Arsenal circa 1856-1858, with 20,000 altered for the US government and 2,000 for the State of New Jersey. The guns were also rifled during the conversion process, with the US gun fitted with long range rear sights as this one is and most of the NJ guns not so equipped.