Nice piece, typical of occupation issues scarcity.
A rarer variety with a punctuation in the date.
Obverse: bust of the ruler in crown, armor and cloak, with the Order of the Golden Fleece, to the right, below it the initials IT, in the rim the legend:
IO CASIM-DG-REX-P-& S-;
Reverse: crowned shields of the Crown of the Kingdom of Poland, the Grand Duchy of Lithuania and the Vasa dynasty, under the crown the denomination marking VI, on the sides of the coat of arms Snop mint marks, in the rim the legend divided by the Wieniawa coat of arms:
MON:ARGEN--REG:POL-1656/7;