Coming in at #3 in the Top 100 Greatest US Modern Coins Book by Schechter and Garrett, it is estimated that fewer than 2 dozen coins exist. A major modern rarity where the S mintmark was inadvertently omitted from the die. This PR68 is one of the finest of the handful known of this exciting rarity. A great coin for a top registry collection. Tied for finest graded at PCGS, including a few CAM examples.