

In sufficiently harsh light, I can get a wisp of the S to reappear. So I guess we can't call this a "no FS" nickel. The F just appears gone, though.
Although this is a late die state, I think this might be a polishing issue. You can see that the right arch in Monticello is much shallower than the left one. The lettering in America seems unaffected. Maybe someone just got overzealous while polishing the die?