Great Britain
William III gold Guinea 1697 AU55 NGC, KM498.1, S-3460, Schneider-492-493, Farey-400 (ER). Second Bust. An extremely rare Guinea date, inaugurating William IV's sole reign gold coinage following the death of Queen Mary in 1694. Represented by just a single other specimen in NGC's census (a VF) and in recent sales records, this is the first such piece we have presented, and was additionally a date altogether missing from the Terner Collection.
https://coins.ha.com/itm/great-britain/great-britain-william-iii-gold-guinea-1697-au55-ngc-/a/3091-32504.s?type=CoinArchives3091
HID02906262019
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Estimate: 3000-4000 USD