First U.S. Commemorative Coin. Minted for the 1892-1893 Chicago World's Fair, the Columbian Exposition Half Dollar commemorates the 400th anniversary of Columbus landing in the Americas. This .900 silver coin features a bust of Christopher Columbus on the obverse and his lead ship, "Santa Maria," and a world map on the reverse.Details:SilverGenuine half dollarCertificate of Authenticity is included