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.