UNITED STATES. Commemorative half dollar. Missouri Centennial. 12.43 gm. 30 mm. The Missouri Centennial. 1921 (15,400 struck). Bust of a frontiersman, left, originally meant to represent Daniel Boone / A frontiersman sending a Native American away, a practice of American settlers in the Missouri Territory at the time. Breen 7451 ("Many were mishandled or spent"). Good Extremely Fine; slight wear, fresh surfaces.