This 16" x 20" photograph has been personally hand-signed by Yogi Berra, Don Larsen, Joe Girardi, David Wells, Jorge Posada, and David Cone with the inscriptions "P.G. 7/18/99, PG 10/8/56, PG 5/17/98." It has been obtained under the auspices of the MLB Authentication Program and can be verified by its numbered hologram at MLB.com. It also comes with an individual numbered, tamper-evident hologram from Fanatics Authentic. This process helps to ensure that the product purchased is authentic and eliminates any possibility of duplication or fraud.