野牛镍币
When the Buffalo nickel had been in circulation for the minimum 25 years, it was replaced with little discussion or protest. The problems of die life and weak striking had never been solved, and Mint officials advocated its replacement. In January 1938, the Mint announced an open competition for a new nickel design, to feature early President Thomas Jefferson on the obverse, and Jefferson's home, Monticello on the reverse. In April, Felix Schlag was announced as the winner. The last Buffalo nickels were struck in April 1938, at the Denver Mint, the only mint to strike them that year. On October 3, 1938, production of the Jefferson nickel began, and they were released into circulation on November 15.