I agree that it looks like an "S". So many of these mint marks are filled, which makes it harder to identify.
It looks like the LI is visible in LIBERTY, however there's some pitting on the surface. I'd call the obverse G6 details. The reverse has some wear in the letters that I would normally call AG, but the rims are complete and most of the lettering is still pretty sharp. I'd call the overall condition G4.
It looks like the LI is visible in LIBERTY, however there's some pitting on the surface. I'd call the obverse G6 details. The reverse has some wear in the letters that I would normally call AG, but the rims are complete and most of the lettering is still pretty sharp. I'd call the overall condition G4.























