Get the special issue "S" mint mark Proof from San Francisco. The one-year-only reverse design is a tribute to Jim Thorpe of the Sac and Fox Nation – often called the greatest athlete of the 20th century. An image of Thorpe dominates the coin, while foreground elements highlight his football and Olympic achievements. His Native American name wa-tho-huk, meaning "Bright Path," is beneath the denomination. Update your collection with the Proof 2018 dollar today.