2022-P $1 Negro Leagues Baseball, DCAM PR70DCAM 认证号45439689, PCGS号896940

In the late 19th century, the baseball color line developed in professional baseball, excluding African Americans from league play. After several decades of mostly independent play by a variety of teams, in 1920 the first Negro National League was formed and ultimately seven major leagues existed at various times over the next thirty years. 1951 is generally considered the last major league season of the Negro American League. The last professional club, the Indianapolis Clowns, operated as a humorous sideshow rather than competitively from the mid-1960s to the 1980s.