1842 AD., Russian Empire, Nicholas I, Ekaterinburg mint, ½ Kopek, KM C 143.1.

Russia, Russian Empire (1721 - 1917), Nicholas I (1825-1855), Ekaterinburg mint, 1842 AD.,
½ Kopek Serebrom (ø 21,5 mm / 3,49 g), copper, 5,12 g. (?) theor. mint weight, mintage 3.600.000 , axis medal alignment ↑↑, plain edge,
Obv.: Н / I , Н -monogram (the Cyrillic "N") surmounted by a crown, within it the letter-numeral I.
Rev.: 1/2 / KOΠҌЙKИ / CEPEБPOMЪ / 1842 / EМ , value, year and mint mark.
KM C 143.1 .

Mint marks:
ЕМ – Ekaterinburg Mint (KM C 143.1)
СМ – Suzun Mint (C#143.4)
СПБ - St. Petersburg Mint (C#143.2)
СПМ – Izhora Mint (C#143.3)
WM - Warsaw Mint (C#143.5)

Year / Mint Mark / Mintage
1839 СМ 454,000 C#143.4
1840 СМ 2,560,000 C#143.4
1840 СПБ ? C#143.2
1840 СПМ 6,400,000 C#143.3
1840 EM 10,999,000 C#143.1
1841 СМ 3,542,000 C#143.4
1841 СПМ 6,400,000 C#143.3
1841 EM 3,384,000 C#143.1
1842 СМ 3,960,000 C#143.4
1842 СПМ 12,800,000 C#143.3
1842 EM 3.600.000 C#143.1
1843 СМ 2,006,000 C#143.4
1843 EM 2,580,000 C#143.1
1844 СМ 3,400,000 C#143.4
1845 СМ 3,000,000 C#143.4
1846 СМ 3,000,000 C#143.4
1847 СМ 2,532,000 C#143.4
1848 MW 87,000 Russia C#143.5 -- or G. 2557 (Warsaw mint) mintmark may also be listed under Poland