1851-O 3CS MS65 NGC. Because of its branch mint status, the 1851-O is probably the most popular issue in this series and certainly one of the most difficult to find in this state of preservation. Both sides display a moderate coating of olive-green, brick-red, and golden patina with the underlying surfaces appearing virtually mark-free and displaying full satiny luster. Population: 47 in 65, 12 finer (8/05).