1989 Lou Gehrig 25c first day cover signed by 15 Hall of Famers: Enos Slaughter, Rick Ferrell, Monte Irvin, Gaylord Perry, Bob Feller, Hoyt Wilhelm, Ralph Liner, Harmon Killebrew, Yogi Berra, Robin Roberts, Early Wynn, Willie Stargell, Al Kaline, and Bobby Doerr, extremely fine and attractive, a wonderful cover, 2022 PSA/DNA certificate