This 16x20 photo was hand signed by 3 of the greatest players to ever play in Houston; Nolan Ryan, Hakeem Olajuwon and Earl Campbell. This item comes with a certificate of authenticity (COA) from JSA - James Spence Authentication, one of the best authenticators in the industry. You will receive a serial-numbered COA along with a matching serial-numbered sticker on the photo. The authenticity can be verified online by entering the serial number.Item pictured may not be the exact item you will receive. It will be similar quality, and we guarantee your satisfaction.