Rare Danzig ducat of John II Casimir from the third issue of this denomination.
Variety with the date around the rim.
Slightly bent.
Obverse: along the inner rim, crowned bust of the ruler, right, with the Order of the Golden Fleece on the chest
IOA•CAS•D•G•R•POL•& SUE•M•D•L•R•P•
Reverse: along the inner rim, a crowned coat of arms of Gdańsk in an oval cartouche held by two lions, above a twig in a wreath, initials GR Gerhard Rogge between the lions' paws
MON•AUREA CIVITAT:GEDANENS:1651
Diameter 25 mm, weight 3.51 g