Poland
Sigismund III Groschen 1597 XF Details (Environmental Damage) NGC, Lublin mint, Unlisted (Gum-924 var?). Deeply patinated, particularly on the obverse, and apparently quite rare as no other examples of this variety have appeared in any archived records available from top-tier numismatic firms.Ex. Poznański Dom Aukcyjny (Auction 14, Lot 499)
Estimate: 3000-4000 USD