This Autographed Sports Illustrated January 26; 1970 Magazine with the inscription of "To Derek Thanks For Your Interest; Peace" has been Personally Signed by Bob Cousy of the Boston Celtics. This item is 100% Authentic to include a hologram by Beckett Authentication Services. This item will come with an affixed Beckett Authentication Services (BAS) authentication sticker; which includes a scannable QR code to verify authenticity. Please note that Beckett no longer provides serial-numbered COA cards; and the attached BAS sticker will serve as the complete authentication for this item. The authenticity can be verified on Beckett Authentication Services website.