Gateway commemorative cover with a color silk cachet honoring 150 years of baseball in America and 11 members of the 500 Home Run Club, signed on the front in ink by eight: Ted Williams, Hank Aaron, Mickey Mantle, Reggie Jackson, Willie Mays, Willie McCovey, Harmon Killebrew, Frank Robinson, and Eddie Mathews. In very fine condition. Pre-certified Steve Grad/PSA/DNA and RRAuction COA.
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