You can view this item on the Beckett Authentication website and it shows when and where the item was signed.
N'Keal Harry Autographed Helmets, Signed N'Keal Harry Inscripted Helmets
ASU Safety Damarious Randall Selected 30th By The Green Bay, 55% OFF
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DANIYEL NGATA SIGNED ARIZONA STATE SUN DEVILS MINI HELMET BAS BECKETT FORKS UP
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Helmets, Football, College-NCAA, Autographs-Original, Sports Mem, Cards & Fan Shop - PicClick