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.