A nice, circulating piece.
Obverse: eagle of the Kingdom of Poland, on the sides of the tail the initials of Karol Gronau - K--G-, on the sides of the crown the date 18-31; in the rim the legend:
MIKOŁAY I.CES-WSZ-ROSSYI KRÓL POLSKI PANUIĄCY; under the eagle legend: 5 ZŁOTY POLSKICH;
Reverse: head of Alexander I to the right; in the rim legend:
*ALEXANDER I.CES-ROS-RESURRECTION-KING-POLS-1815;