VERY RARE! Japanese Imperial Navy Mine Operations Proficiency Badge

Avoidable Sinking of Japan s Secret Supercarrier SHINANO

Japanese Imperial Navy Mine Operations Proficiency Badge (Mine Operation Superior Badge). Very rare! japanese imperial navy mine operations proficiency badge instituted on april 14, 1919. Please check the photos attentively they show lot's quality. Awarded to NCO sailors who passed tests in mines and mine placement.