Rare 1991 Pro Line certified autograph card of Buffalo Bills Hall of Famer O.J. Simpson signed on the front in blue ballpoint, with embossed 1991 National Convention seal of authenticity and the card number missing on the back. These cards were signed at an invitation-only event at the 1991 National Convention in Anaheim and embossed on the spot. About NrMt condition. ONLY ONE AVAILABLE FOR SALE.