1852-O Liberty Seated Half Dollar. WB-1. Rarity-4. AU-55 (PCGS).An overall sharply defined example dressed in a blend of warm pewter gray, deep rose and blue-gray patina. Discounting the noncollectable 1853-O No Arrows, the 1852-O is the scarcest New Orleans Mint issue in the Liberty Seated half dollar series. Among certified survivors, most are in lower grades than offered here.From the Boston Old City Hall Collection.