cf.KM-Pn18. Tied with one other example at this grade level (though RB designation) with just two examples certified finer (at PF-65 BN) at either PCGS or NGC. Interesting die break across the reverse from 3 oclock to 9 oclock. Sharply struck with good definition of the fine details. Gorgeous electric blue and sea foam green highlights. NGC PROOF-63 BN. From the Richard Stuart Collection.
