RUSSIA. Union of Soviet Socialist Republics. 15 Kopeks, 1942. NGC MS-63. KM-Y-110. A captivating coin with soft golden tone that meanders over both sides and abundant sparling luster in the fields. The<strong> KEY DATE </strong>for the issue and considered among the rarest Russian minors of the 20th century. While offerings in Mint State appear infrequently, an example certified by NGC as a MS-62 appeared in a Goldberg auction in 2013 and brought $775 hammer.