1923-s Monroe Old Commem Half Dollar 50c Grades Choice AU/BU Slider. One may think that the Reverse of the Two Continents of The Western Hemisphere but upon closer examination you will see that they are two women bent into the general shapes of the two continents. When examining a Monroe Commemorative the cheeks of the two statesmen on the obverse and the figures that represent the two continents on the reverse are the highpoints and will show wear first.