Roy Williams Autographed/Signed Oklahoma Sooners 8x10 Photo Prova 37711 The number in the listing title is just an inventory sku for our records and is not the authentication number. The item pictured is a stock photo unless otherwise noted. This is a 8x10 photo that was personally autographed by Roy Williams. Includes a Prova Authentication hologram and a certificate of authenticity from Denver Autographs.