.58 caliber. 33" round barrel secured by two flat iron spring retained bands. NSN. Bright barrel, color casehardened lock, iron furniture with short brass nose cap, walnut stock. Single shot, muzzleloading percussion rifle with Maynard automated tape primer lock. Lock marked in two horizontal lines forward of the hammer: US/HARPERS FERRY and dated 1859 at tail of lock. Primer magazine door with {Spread-Winged Eagle}. Breech dated 1859 as well, breech with standard V/P/{Eagle Head} inspection marks. Counterpane with two clear script cartouches, the AMB of Harpers Ferry's Master Armorer Armistead M Bell and the TR of Thomas Russell, foreman of the Harpers Ferry rifle shop. US on buttplate tang, "U" marks on both barrel bands. 1858 Pattern three-leaf, short base rear sight with the sight leaves appropriately marked "R", low-base iron rifle front sight, saber bayonet lug on obverse of barrel near muzzle. Iron furniture throughout, with the exception of the short brass nose cap. Second type stock with patchbox cut in an oval with an original spare nipple in the patchbox. 1855 pattern hammer with primer tape cutter face and notch in nose. Rifle retains both sling swivels and an original tulip head, swelled shank ramrod with good threads at the end. This was a transitional variation of the 1855 Rifle, long known simply as the "Type II" 1855 Rifle, lumping all iron mounted guns together regardless of evolution or minor differences in features. Willyard has reclassified these guns as "Type IV" and his research suggests that only 294 of these iron mounted rifles with brass nose caps were produced circa 1859, using up the inventory of old stock tips available. A very nice example of the classic "iron mounted" variant of the 1855 rifle to be made before the war erupted.