This Autographed Auto Grade Gem Mint 10! 2017 Topps Allen & Ginter #279 Card has been Personally Signed by Randy Johnson of the Arizona Diamondbacks. This item is 100% Authentic, it comes slabbed and authenticated by Beckett Authentication Services. We have multiples of this same item. While the photographs are representative of this item, the size and placement of the signature may vary. Each item is hand signed, therefore, each autograph is unique.