The trial edition of the Saint-Petersburg mint
(letters "С.П.Б." without the initials of mintmaster. The design matches the coin 1839-1847 years.The obverse of the coin
shows the monogram of Nicholas I (the large stylized letter "Н" over her great Imperial crown, below the Roman numeral "I"with horizontal corrugation).On the coin reverse
in the middle of the set value: the number "1" under it in two lines, the inscription - "КОПЕЙКА СЕРЕБРОМ"(reference to the silver ruble). The left and right of the number "1" has two stars. Below another horizontal line, consisting of two tapering towards the edges of the lines with a dot in the middle, under it the date of issue "1840.". At the bottom of the letters "С.П.Б."(Saint-Petersburg).