Russia Alexander II gold Prize Medal ND (ca. 1855), prize medal to

Russia
Alexander II gold Prize Medal ND (ca. 1855), prize medal to students of the St. Petersburg Technological Institute, unsigned, Bust of Alexander II right / Circular inscription within wreath, Diakov 646.6, Smirnov 569 b/3, MS63 NGC. Mirror proofllike fields, with a high relief portrait of Alexander. The devices are nicely frosted, and the overall appearance is superb.

Estimate: 20000-25000 USD