RUSSIA. Ruble, 1741-CNB. Ivan VI (1740-41). NGC AU-55.References: Dav-1676; KM-207.2; Bit-21; Dia-6. Emperor Ivan VI Antonovich of Russia, was born in August, 1740 to Duchess Anna Leopoldovna (niece of Empress Anna of Russia). Empress Anna, aged 47 in 1740 was in ailing health and without a clear successor to the throne. Empress Anna wished to secure the line of her father, Tsar Ivan V (co-r ...