First day cover honoring the centennial of baseball, postmarked at Cooperstown on June 12, 1939, signed in fountain pen, "Eddie Collins." In fine condition. Accompanied by a full letter of authenticity from JSA. This three-cent postage stamp honoring baseball's 100th anniversary was issued in conjunction with the dedication and opening of the National Baseball Hall of Fame in Cooperstown, New York, on June 12, 1939. Eddie Collins, a six-time World Series champ and member of the 3,000 Hit Club, was elected to the Hall in 1939. Encapsulated in a PSA/DNA authentication holder.
