Medal. Bronze. 79.5 mm. By V. Alexeev and A. Griliches. Centennial of the Mining Industry, 1873. Diakov 802.1. Winged Genius crowns oval portraits of Catherine II and Alexander II with wreaths, shield with crossed hammers below / View of the Institute, Griliches signature below. Dark caf. au lait. About Uncirculated. Estimated Value $350