This Autographed Bobby Brown Oal Baseball has been Personally Signed by Mickey Mantle, Willie Mays, Hank Aaron, Eddie Mathews, Harmon Killebrew, Ernie Banks, Reggie Jackson, Willie McCovey & Frank Robinson. This item is 100% Authentic to include a Certificate of Authenticity (COA) / hologram by Beckett Authentication Services. The authenticity can be verified on Beckett Authentication Services website.