RUSSIA. Siberia. 5 Kopecks, 1779-KM. Catherine II (The Great). NGC MS-63 Brown. WINGS Approved.KM-C-5; Bit-1084; Brekke-484. Another sharply struck large format copper issue exhibiting fine intricate details with smooth fields and luster that is subdued from old envelope mustiness. Clearly an example which sat for a prolonged period of time undisturbed.