Includes Williams and Mantle - SGC Encapsulated. Spectacular complete Perez-Steele Celebration Baseball postcard set with 38 of the cards autographed. All sigantures were acquired in person at shows. The cards of Mickey Mantle and Ted Williams have been encapsulated and authenticated by SGC. Signed cards include Hank Aaron, Luis Aparicio, Ernie Banks, Johnny Bench, Yogi Berra, Lou Boudreau, AB Chandler, Ray Drandridge, Bill Dickey, Bob Doerr, Rick Ferrell, Chas Gehringer, Billy Herman, Catfish Hunter, Monte Irvin, Al Kaline, George Kell, Harmon Killebrew, Ralph Kiner, Bob Lemon, Buck Leonard, Al Lopez, Juan Marichal, Eddie Mathews, Willie McCovey, Johnny Mize, Stan Musial, Pee Wee Reese, Brooks Robinson, Joe Sewell, Enos Slaughter, Duke Snider, Warren Spahn, Willie Stargell, Billy Williams, Carl Yastrzemski. All are guaranteed to pass 3rd party authentication. The only flaw is some scuffing to the exterior of the slipcase for the box.