Nicely preserved piece, well-preserved details, patina.
Obverse: head of Alexander I to the right, in the rim a legend:
*ALEXANDER I.CES-ROS-RESURRECTION-KING-POLS-1815;
Reverse: in oak wreath: 2/ZOL-POL/1828, under the wreath initials F-H-, in the rim legend:
MIKOŁAY I.CES-WSZ-ROSSYI KING OF POLAND REIGNING MONARCH