1840 AD., Russian Empire, Nicholas I, Ekaterinburg mint, ½ Kopek, KM C 143.1.

Russia, Russian Empire (1721 - 1917), Nicholas I (1825-1855), Ekaterinburg mint, 1840 AD.,
½ Kopek (Denga) (21 mm / 5,04 g), copper, mintage 10.999.000 , medal alignment ↑↑ , smooth edge,
Obv.: Н / I , Н -monogram (the Cyrillic "N") surmounted by a crown, within it the letter-numeral I.
Rev.: 1/2 / KOΠҌЙKИ / CEPEБPOMЪ / 1840 / E. M. , value, year and mint mark.
KM C 143.1 .