1846-O Liberty Seated Half Dollar. WB-27. Rarity-4. Tall Date. AU-50 (ANACS). OH.Steel-olive patina throughout. This is a scarce and popular Guide Book</em> variety of the 1846-O half dollar that has long commanded a premium in the numismatic market. Only six of the known varieties of the issue employ one of the two identified Tall Date obverse dies.PCGS# 6256. NGC ID: 24H9.From the Steve Studer Collection.