Poland
Danzig. Wladislaw IV gold Ducat 1639 AU58 NGC, Gerhard Rogge as mintmaster, Fr-15, Dutkowski/Suchanek-234 I. A rare specimen, particularly in this problem-free certified grade. The clarity of the strike is remarkable and accentuated by flashy fields, the obverse gently muted by light tone. Superb.
Estimate: 5000-6000 USD