Bill Russell's 1975 Naismith Memorial Basketball Hall of Fame ring -- earned after dominating the NBA for 13 seasons -- is on the auction block, and is expected to sell for upwards of $200K!!
TMZ Sports has learned the ring, which SCP Auctions describes as a "fine piece of jewelry," weighs 65 grams and is 14-karat gold with 1.625 carats of real diamonds.
The top of the huge, 12 3/4 sized ring resembles a basketball, and has the words "Naismith Basketball Hall of Fame" encircling the brown enamelwork.