This Autographed Auto Graded Gem Mint 10! January 12, 1975 Super Bowl IX Steelers vs. Vikings 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.