No need for an image, just measure the length of the cylinder. With a 4 digit serial number, if 1 7/16" it has to be a 44 Russian and if 1 9/16" it has to be a 44 Frontier. The long cylinder was not available prior to the introduction of the 44 Winchester Frontier DA in 1886. The 44 Russian DA had the short cylinder until around 15,000 serial number.