A very nice piece with almost gearless details.
Mechanical damages.
Obverse: head of the Czar to the right, in the rim the legend:
*ALEXANDER AND EMPEROR SA-W-ROS-KING OF POLAND;
Reverse: eagle of the Kingdom of Poland, on the sides of the tail initials - I--B-, on the sides of the crown date 18-17; in the rim inscription:
5 POLISH ZLOTYS/17 211/625 WITH GRZ-CZ-KOL-;