Poland
Lithuania. Sigismund III gold Ducat 1591 VF35 NGC, Fr-7 (this date unlisted), Gumowski-1352 (RR), Ivanauskas 7SV4-3 (RRRR). Obv. Crowned bust of Sigismund III right with large collar. Crowned arms dividing date. The flan is a bit wavy, with noticeable obverse marks. An extreme rarity, unlisted in most references, and unpictured even when listed. We can reference no other example of this issue.
Estimate: 80000-100000 USD