Bohemia
Rudolf II gold Ducat 1586 AU Details (Removed from Jewelry) NGC, Prague mint, Fr-88. An excellent representative example of the issue with a number of surface hairlines and small marks, but no obvious signs of mount removal along the rims, although there are a couple of tiny nicks along the lower edge that may be artifacts of bezel prongs.
HID02901242017
Estimate: 800-1200 USD