Heritage auctions has sold MS66 1983-P 5C MS66 PCGS. That's a Non FS or full steps designation PCGS has its best specimen at MS67. So for sure a super high mint state is possible without the FS or full steps designation.
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AAdmin • Jul 31, 2026
So I imagine the Full steps come from the quality of the die, or the condition of the die striking the planchet. Full steps is likely only possible from a new die, and as the die wears out the steps are not as nice and clean.
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AAdmin • Aug 11, 2026
Technically MS70 is possible but I did not find any sold or available in that condition.