A very pleasant piece with a well-preserved luster.
On the obverse the initials of Nikolai Grachev - mincmaster of St. Petersburg.
Obverse: eagle of the Russian Empire of the 1825 pattern, under it the initials НГ, in the rim the legend:
1831 ГОДА. МОНЕТА РУБЛЬ;
Reverse: in a laurel and oak wreath crowned mint ordination information:
ЧИСТАГО/СЕРЕБРА/4 ЗОЛОТН./21 ДОЛЯ./С.П.Б..;