This Autographed Sellig Baseball has been Personally Signed by Tom Seaver, Nolan Ryan & Jerry Koosman of the New York Mets. 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. Seaver & Koosman were previously authenticated by JSA, prior to adding Ryan. This baseball will not have its matching JSA card.