in the center of the disk - the emblem of the Bank of Russia (double-headed eagle artist I. Bilibin), under it to the right - the mint's trademark. On the circumference there are inscriptions framed by a circle of dots and divided by ornamentation: at the top - "ONE RUBLE 1992", at the bottom - "BANK OF RUSSIA".

image of N.I. Lobachevsky with his arms crossed on his chest, along the rim on the left - the inscription: "NI LOBACHEVSKY", on the right - the dates "1792 · 1856".

two deeper inscriptions "ONE RUBLE", separated by two asterisks

Nikolai Ivanovich Lobachevsky (1792-1856) - Russian mathematician, creator of non-Euclidean geometry. In the years 1827-1846. - Rector of Kazan University. The discovery of Lobachevsky (1826, published 1829-1830), which was not recognized by his contemporaries, revolutionized the notion of the nature of space, which was based on Euclid's teachings for more than 2 thousand years, and had a tremendous impact on the development of mathematical thinking. He wrote works on algebra, mathematical analysis, probability theory, mechanics, physics and astronomy.