Naval Navigation School Advanced Steering Course Graduation Commemorative Watch Fobs/海軍航海学校期高等科操舵術練習生卒業記念章

See also https://asiamedals.info/threads/nav...se-graduation-commemorative-watch-fobs.26207/ and https://asiamedals.info/threads/nav...se-graduation-commemorative-watch-fobs.30936/.

Silver.
Size 50.8 x 38.1 mm.

Obverse

高練 for Advanced Training

reverse

海軍航海學校 - Naval Navigation School

第二十期高等科 - 20th Class Advanced Course

操舵術練習生 - Steering/Ship Сontrol Trainee/Cadet

卒業記念 - Graduation Commemorative

Marked 純銀 - pure silver.