The Twenty Cent piece (1875-1878) is one of U.S. coinage's most spectacular failures. Too similar in size and design to the quarter dollar, it caused widespread confusion in commerce. Most were minted only in 1875-1876, with tiny proof-only mintages in 1877-1878. The denomination was quickly discontinued, making these silver coins highly desirable to collectors. The 1876-CC (Carson City) is particularly sought after, as are the rare 1877 and 1878 proof strikes.