Graded EX-MT 6 by PSA. Hall of Famer. The legendary Boston Celtics center Bill Russell has signed this historic Upper Deck Exquisite Collection "Number Pieces Autographs" collectible in blue ink. A multicolored game-used warm-up patch is located on the card's front under a die-cut "6" window. A statement on the card's back by Upper Deck attests to the authenticity of the signature and memorabilia component, and serves as the item's COA. The limited-edition piece is serial-numbered "6/6," matching Russell's jersey number with the Celtics! This is the only example of this card graded at its tier in the PSA population report, with none graded higher! The pop report info is accurate at the time of this writing. Excellent to Mint condition.