1855-O Liberty Seated Half Dollar. Arrows. WB-Unlisted. MS-64 (PCGS).A moderately and attractively toned example with the most vivid and varied colors reserved for the obverse. The 1855-O is one of the more popular type issues in the brief Liberty Seated, Arrows half dollar subseries of 1854 to 1855. The present example is struck from WB Obverse 10 with a tiny die lump on Libertys gown along the neckline. The reverse is seemingly unlisted, however, and it is in a late die with myriad peripheral cracks.