A Dallas Cowboys Speed Replica Salute to Service 2 NFL Helmet hand signed by Jimmy Johnson. The signature and item are in excellent condition. Jimmy is a former football coach and sports analyst. He is the first head coach to win both the College Football National Championship and a Super Bowl. AUTHENTICATION: The item has been tagged with a SmarTag powered by Prova Technology, which gives you digital access to the items authentication records, including a proof picture from the signing.