1/2 Kopek 1925 UNC Coin Soviet Union CCCP Y# 75 Posted on October 3, 2023 by admin Krause number Y # 75. Country of the USSR. The Soviet Union (1924 – 1958). Type of coin Circulating coins. Obverse / reverse Medal (0 °). Mass (g) 1.64. Thickness (mm) 1.1.