1920 50C F15 Certification #37508309, PCGS #6580
In mint state condition, the 1920 is not quite as rare as the 1918, but the two coins are about equal rarity in Gem (MS65 or better) condition. A Gem MS65 1920 is a rare coin and grades above MS65 are very rare. The 1920 is almost always very well struck. The luster is the soft satiny look of the earlier Walkers.