Rare Estate Sale Find! Uncirculated 1923-S Monroe Doctrine Centennial Commemorative Half Dollar. Discovered in a recent estate sale, this authentic 1923-S Monroe Doctrine Centennial Commemorative Half Dollar remains in stunning Uncirculated condition. Never cleaned or tampered with, its original mint luster shines through. Mint Mark: S (San Francisco). Denomination: Half Dollar. Type: Monroe Doctrine Centennial Commemorative. Condition: Uncirculated (not cleaned or tampered with). Mintage: Only 74,723 coins minted (Los Angeles issue). Genuine estate sale find. Own a rare piece of American numismatic history!