Disclaimer: The image is not of an authentic 1851-O, this Seated Dollar, date and mint, is known by one example. We used an normal 1851 and added an O mint marks for illustration purposes only. So this coin can't be used in identification of a possible normal or authentic 1851-O.
Specifications:
Designer: Christian Gobrecht
Diameter: 38.1 millimeters
Metal Content:
Silver - 90%
Copper - 10%
Weight: 26.73 grams
Edge: Reeded
Mint mark: None (for Philadelphia) below the eagle on the reverse.
1851-O Seated Silver Dollar
Mintage: 0 Proof: 1 Unique
1851-O Seated Liberty Dollar Values
Date Mintage AG3 VG8 VF30 EF45 AU55 MS63 MS65
1851-O Unique