Well-preserved details.
Coin with the initial of Fyodor Blyum.
Obverse: eagle of the Empire, between its legs and tail the initials ФБ, 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:
MOHETA/РУБЛЬ/1856/СПБ;