This Autographed Auto Graded Gem Mint 10! January 21, 1979 Super Bowl XIII Steelers vs. Cowboys Replica Ticket Stub with the inscription of "HOF 87" has been Personally Signed by Joe Greene of the Pittsburgh Steelers. This item is 100% Authentic, it comes slabbed and authenticated by Beckett Authentication Services. The authenticity can be verified on Beckett Authentication Services website.