Only 8% of 1981-S Susan B. Anthony dollars have this elusive clear S mintmark. The original die, which created a filled S, was re-cut late in 1981, producing this low-mintage scarcity. These proofs were not issued separately, but only as part of that year's 5-coin proof set. San Francisco Mint 1981 dollar proofs feature finest-quality minting with crisp, double-struck engravings and dazzling mirror backgrounds.
Mintmark San Francisco