A beautiful piece with very nice details and exquisite presence highlighted by a beautiful age patina.
On the obverse one can see the initials HI - Nikolai Joss - who held the office of Mincmaster of the St. Petersburg mint several times.
Obverse: the eagle of the Empire of the 1832 pattern, between its legs and tail the initials H-I, in a rope border, in the outer border an inscription beginning with a rosette:
ЧИСТAГО СЕРЕБРА 4 ЗОЛОТНИКА 21 ДОЛЯ;
Reverse: in a laurel and oak wreath crowned inscription:
РУБЛЬ/1872/СПБ;
Rare in such excellent state of preservation.