野牛镍币
The design for the Buffalo nickel is well regarded today, and has appeared both on a commemorative silver dollar and a bullion coin. However, during the time it was struck (1913–1938), it was less well liked, especially by Mint authorities, whose attempts to bring out the full design increased an already high rate of die breakage. By 1938, it had been struck for 25 years, thus becoming eligible to be replaced by action of the Secretary of the Treasury rather than by Congress. The Mint, which is part of the Department of the Treasury, moved quickly and without public protest to replace the coin.