Russian Empire. Badge of graduation from the Naval Technical School named after Emperor Nicholas I. Approved on 12.04.1910.
The school was located in Kronstadt. It dates back to 1799. Since 1914 it consisted of two departments: shipbuilding and mechanical. The duration of the training was 4 years. Disbanded in 1918.
Bronze, enamel, silver plating. Chipped enamel on the central shield. Size 47*34.6mm. Weight (without nut) 21.8 g.