Switzerland
Basel. City gold Ducat 1640 AU Details (Damaged) NGC, KM97, Fr-50, HMZ-2-73h. Characteristically wavy and a very difficult issue to procure at all, the principle details of the design still fairly strong, particularly so in the eagle. Sold with old tag of Dr. Hans Nussbaum, Zürich.
From the Allen Moretti Swiss Collection
https://coins.ha.com/itm/switzerland/basel/switzerland-basel-city-gold-ducat-1640-au-details-damaged-ngc-/a/3076-34642.s?type=CoinArchives3076
HID02906262019
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Estimate: 605-750 USD