A beautiful piece.
Minor sheet flaws typical of this issue.
Superbly preserved mint luster. The coin extremely rare in such condition.
Obverse: in the pearl rim a royal bust wearing a crown, armor and cloak studded with jewels, with the Order of the Golden Fleece, to the right, in the outer rim the legend:
IOAN CASIMI D G REX POL & SVEC M D L R P;
Reverse: in the pearl rim crowned with a five-pointed crown with 9 jewels in an open rim, with 5 rosette fleurons, a five-pointed decorative shield with the coats of arms of the Crown, the Grand Duchy of Lithuania and the coat of arms of the Snopes of the Vasa dynasty, the sides of the denomination marking 1-8 and initials A-T, in the outer rim the legend punctuated by the Wieniawa coat of arms in the Shield:
COIN NOVA RE-GNI POLON 1659;