Funny I have an upcoming column on the Enfield two band rifles. The bayonet is German, A & A S is August and Albert Schnitzler, Solingen. The 24 proof markings correspond with .58 caliber. 1861 dated Tower lock. Looks like a garden variety P 56 Enfield short rifle. What was the distinction between the Enfield "short" and "long" rifle? The Enfield pattern of 1853 "long rifle" had a 39" barrel with three barrel bands and was sometimes called the P53 rifle-musket. It was by far the most common English military rifle imported by both sides. The Enfield "short rifle" had a 33" barrel, two barrel bands and could be either the Pattern of 1856, Pattern of 1858 or (less likely) Pattern of 1860.
How common were imported two band Enfield short rifles? It's hard to say because period records did not always distinguish between the Enfield "long rifle" (P53) and the various "short rifles" (P56/58/60), much less the exact model of short rifle. In the Official records of the War of the Rebellion Series IV, Vol III, p. 383 in December 1862, J. Gorgas provides a summary abstract to Secretary of War Seddon of purchases made by Caleb Huse as follows: "131,129 stands of arms consisting of 70,980 long Enfield rifles, 9,715 short Enfield rifles, 354 carbine Enfield rifles, 27,000 Austrian rifles, 21,040 British muskets, 20 small bore Enfield, 2,020 Brunswick rifles. There were also 23,000 Enfield rifles in London awaiting shipment..." The ratio of roughly 7:1 is probably about right as the "short rifle" was about 25% more expensive than the P53 rifle-musket. Perhaps it was due to the increased cost of the saber bayonet? More likely is that for manufacturers of both short and long rifles--especially in the same factory-- the stock cutting machines had to be set up differently. For whatever reason(s) Enfield "short rifles" were much less common than the long rifles. If the short rifles had been cheaper v. more expensive, it probably would have been the other way around. Soldiers for their part referred to the Enfield short rifles as "lighter and handier." They were often assigned to the sharpshooters in the company as "...accuracy was considered slightly better than that of the (Enfield) long rifle."
The majorities of Enfield "short rifles" used in the US Civil War by both sides were a mix of two types of the Pattern 1856. The first type P-56 had the bayonet lug on the barrel and the later version had the bayonet lug on the top barrel band. A small number of P-58 Naval Rifles were purchased early in the war as well, at least by the Confederate States. The P-58 Naval Rifle was similar to the P-56, but with a few cosmetic changes and different rifling. The P-58 was a brass mounted rifle, instead of iron mounted and had the rear sling swivel attached to the front of the trigger guard like the Enfield P53 "long rifle" instead of being screwed into the stock behind the trigger guard like the P-56. The Naval Rifle typically retained the 1,100-yard rear sight of the P-1856, but the 33" barrel was heavier and rifled with five grooves instead of three. However, the P-58 rarely (if ever) appears in period images where an Enfield short rifle can clearly be made out. Why so few?
One factor that may have limited its utility is that the P-1858 Naval Rifle was designed to accept a non-standard cutlass bayonet instead of the P56 saber bayonet. CS orders of the P58 Naval Rifle appear to be very limited, perhaps as few as 700. Hence based upon the known documentation it appears that less than one percent of the Enfield short rifles imported during the Civil War were of the 1858 Naval Rifle pattern. Ironically, the Italian made reproduction Enfield short rifles are based on the P58 Naval rifle.
The later Enfield Pattern 1860 "short rifle" had a very limited production run. It was first adopted in November 1860 and soon afterwards replaced in August 1861 with the Pattern 1861 "Army Rifle." The production at Royal Small Arms Manufactory did not commence until 1861 and only a few thousand were produced. The majority of these were held at the Tower (in storage) until converted to Snider breechloaders in 1866-67.These would of course, not have been sold to either side in the US Civil War. An unknown number may have been commercially made in Birmingham or London and sold to either side, but the surviving documents do not indicate exactly which pattern of Enfield "short rifle" was made to fill any specific contract, except as previously noted. Therefore, given the limited numbers of both the P-58 and P-60, the greatest likelihood is that the majority of Enfield short rifles in use during the US Civil War were the Pattern of 1856. The images of US and CS soldiers with Enfield short rifles also bear this out.