野牛镍币
On earlier coins, the head was much smaller in relation to the size of the coin. For example, on a Lincoln cent, the head covers about one-sixth of the area. On the Buffalo nickel, the Native American's head occupies about five-sixths of the area. Moreover, the nickel is a larger coin. Large heads also adorn the Morgan dollar and the Columbian half dollar commemoratives of 1892-93, but these coins were rarely altered due to their high value.