Poland under Russia, Nicholas I, Rouble 1844 MW, Warsaw

A beautiful circular piece. Distorted background.

Obverse: crowned eagle of the Russian Empire, on the sides of the tail the initials M-W, in the rim the legend:
ЧИСТОГО СЕРЕБРА 4 ЗОЛОТНИКА 21 ДОЛЯ;

Reverse: in a laurel and oak wreath crowned inscription:
МОНЕТА/РУБЛЬ/1844;