Digging through last bying pile of coins, I see two interesting nickels. One, 1948 looking like die clash, but this one, looks amazing. Beautiful, looks like just now come from mint. Can this coin be a my first Full step nickel. Sorry for bad pictures
I don't see a D mint mark. IMO your coin looks like a Proof coin. If it is, they don't designate FS for proofs. @Razz beat me to it.
That's a proof coin. They don't do full steps because they have already sharp details with it being a proof And FS is the designer initials. Very nice proof though.