Commemorative 1989 postal cover with a cachet honoring the 11 living 500-home-run hitters, 9.5 x 4, signed in blue and black ballpoint by all 11: Hank Aaron, Willie Mays, Frank Robinson, Harmon Killebrew, Reggie Jackson, Mike Schmidt, Mickey Mantle, Ted Williams, Willie McCovey, Eddie Mathews, and Ernie Banks. In very fine condition. Auction LOA Steve Grad/PSA/DNA and R&R COA.
