The howitzer itself measures approximately 58 inches from the muzzle to the cascabel and has a 4.62 inch bore diameter, smooth bore, and 48 inch bore length (including the powder chamber). The barrel is three-stage and has a small blade front sight near the muzzle and a groove at the breech for a rear sight. There are some obscured markings on the trunnions and on the tube near the trunnions. Among those markings "IC" is legible, the foundry marking of John Clark (historically I was used in place of J). The lower marking on the trunnions "NO" for New Orleans. The full-scale reproduction carriage has black painted iron components and olive green painted wood. The wheels are approximately 57 inch wheels in diameter, and a rod and sponge is fitted on each side. This gun is similar to the U.S. Model 1841, 12-pounder howitzer. 12-pounders of varying designs were the most widely used smoothbore artillery pieces used during the Civil War and were made both within the U.S. and C.S.A. and imported from abroad. In "Field Artillery Weapons of the Civil War" by Hazlett, Olmstead, and Parks, the authors note that John Clark field howitzers could be easily misidentified as Model 1841s and note that six others have been located, and only one has identifying markings ("JOHN CLARK./MAKER./N.O." at Shiloh). One other Clark field howitzer has been sold at auction that has markings as well. This could be the only surviving example with abbreviated markings. A Clark howitzer is illustrated and listed as at Shiloh National Military Park on page 80 and matches this piece as do others that have been photographed at Civil War battlefields. The book also indicates the following features can be used to identify Clark's howitzers: unusual muzzle swell and chase astragal (feature unique to Clark howitzers), coarseness, the lack of fillet at the forend of the neck of the knob, cylindrical powder chamber, and imperfections in the bronze. These are all found on this piece. Craig Swain of "To the Sound of the Guns: Civil War Artillery, Battlefields and Historical Markers" indicates there are two John Clark howitzers at Shiloh, two more at Manassas, and one other at Petersburg. He states: "Before the war, John Clark owned a foundry at the intersection of Race and Tchoupitoulas Streets in what is today the Lower Garden District, close to the Mississippi River. At the outbreak of war, Clark announced his firm could produce bronze field pieces for interested parties. From June 1861 to the fall of New Orleans to the Federals in April 1862 the firm produced over 100 cannons. Most of these were for private contracts. Many of these went to the artillery batteries from New Orleans. For the most part, the foundry produced two types – 6-pounder Field Guns and 12-pounder Field Howitzers. Orders by the Confederate government for Armstrong pattern guns were unfilled when the city fell."