Silver medal 1783, 12.01 g. On the Russian academy of sciences on October 21st. Unsigned. Radiant monogram within laurel wreath. Rv. On a pedestal in the form of a cube with an inscription, a book, lyre, scepter, and an owl on a globe. 34.3 x 34.2 mm. Diakov 199.6. Good extremely fine. Cabinet piece with beautiful patina.