John II Casimir, 6 groschen 1665, Vilnius

A beautiful mint piece with well-preserved luster. Undated centrally. Patina, tarnish.

A very rare coin in such a state of preservation, indirectly evidenced by the fact that only one piece received a numerical note for mint condition in NGC grading.

Variety with the IOA CASI legend.

Obverse: royal bust in armor with 4 buttons on the chest, with a protruding lace collar, with a mantle fastened with a rosette-shaped jewel in the inner pearl border, in the outer border a legend punctuated with the initials T.L.B:

Reverse: beneath the grand ducal mitre a Pogo in a pearl border, below it a denomination marking *VI*, below it a shield of arms with the Krishpin coat of arms, in the outer rim a legend:
GROS-ARGEN-SEX-MAG-DVC-LIT-1665;