1992 1 RUBLE NIKOLAI LOBACHEVSKY RUSSIA

Commemorative Russian ruble honouring Nikolai Lobachevsky, the renowned mathematician and founder of non-Euclidean geometry. Minted in 1992, this coin celebrates one of Russia's greatest scientific minds. Features detailed portraiture and historical significance, making it a valued addition to any numismatic collection. A piece of Russian cultural heritage and mathematical history in coin form.