An exquisite mint piece.
Obverse: in the rim a royal bust wearing a crown, armor and cloak, with the Order of the Golden Fleece, to the right, in the outer rim the legend:
IOAN CAS D G REX POL-& S M-D L-R-P;
Reverse: in the rim crowned two, slightly curved coat-of-arms shields with the coats of arms of the Crown and the Grand Duchy of Lithuania, with bows at the corners, above, under the crown the denomination mark VI, below, the initials -A-T- divided by the coat-of-arms Snop of the Vasa dynasty in a simple coat-of-arms shield, in the outer rim the legend divided by the Ślepowron coat-of-arms:
GROS ARG SEX-REG POL 1663;
