Watch List notes:

George IV, pattern crown, 1820, by Mills for Whiteaves, GEORGIUS IV DEI GRATIA, very large bare head, with little neck, l., G. MILLS. F on truncation, MDCCCXX below rev. BRITANNIARUM ET HAN: REX FIDEI DEFENSOR, royal arms on square shield within Garter, crowned and with supporters, helmet, crest, scroll etc., PUB. BY R. WHITEAVES below, edge plain (ESC.259; L&S.7), deeply toned, in plastic holder, graded by PCGS as Proof 63, very rare
£7500-8500