That's a beauty! And for a very nice price, too. From the pictures she is EF45 with AU50 potential. I did note a scratch from her cheek down through her gown. I hope that isn't too distracting in-hand. Is that a short die break off her left wrist?
The San Francisco mint
Seated halves from 1855-58 are scarce and expensive. The 1855-S was extremely rare until the SS Republic coins hit the market. It's still a desirable date/mm.