This 90% silver commemorative half dollar honors the centennial of the Monroe Doctrine, which asserted that the U.S. would not tolerate European interference in the Americas. Shown circa 1823 are James Monroe and his Secretary of State, John Quincy Adams. The reverse features a relief map of North and South America with two female figures altered into the shape of each continent. Just 274,077 were issued. Extra Fine quality with clear details.