This Autographed Riddell TK 2 Suspension Authentic Full Size Proline Helmet with the inscription of "SB VI Champs, HOF 80, Mr Cowboy, NFL 100 Greatest, 1st Cowboys Draft Pick, 11X Pro Bowl" has been Personally Signed by Bob Lilly of the Dallas Cowboys. This item is 100% Authentic to include a Certificate of Authenticity (COA) / hologram by Beckett Authentication Services. The authenticity can be verified on Beckett Authentication Services website.