Hobo Nickel Art Coin

Another factor contributing to the Buffalo nickel's popularity was the sex of the subject. Nearly all previous coins had depicted women (Liberty head nickels, Indian head cents, Barber and Morgan silver dollars). A male head has larger, coarser features (nose, chin, brow) that can be altered in many ways. Even the buffalo on the reverse could be changed into another animal or a man with a backpack.
Classic old hobo nickels (1913–1940)
Many talented coin engravers, as well as newcomers, started creating hobo nickels in 1913, when the Buffalo nickel entered circulation. This accounts for the quality and variety of engraving styles found on carved 1913 nickels. More classic old hobo nickels were made from 1913-dated nickels than any other pre-1930s date.