1942
Obverse
雷爆 - Navy Air Bomb and Torpedo
reverse
皇紀2602年 - 1942
大東亞戰事之秋 - Great East Asia War, Autumn
第十五期高等科航空兵器術 - 15th Advanced Aircraft Weapons Course
雷爆練習生卒業記念 - Navy Air Bomb and Torpedo Trainee Graduation Commemorative
15th advanced aircraft weapons course
imperialjapannavy badge
imperialjapannavywatchfobjapanese air force school graduation badge
japanese air force school graduation watchfob
卒業記念章
第十五期高等科航空兵器術雷爆練習生卒業記念章
高等科航空兵器術雷爆練習生卒業記念章
Size 25 x 30 mm.
Weight 7 g.
Reverse
第一潜水戦隊 - First Submarine Squadron http://hush.gooside.com/Order/GF/ss.html
昭和九年 - 1934
Original case.
Watch fob was made by Hattori workshop https://asiamedals.info/threads/history-labels-i-marks-of-hattori-watch-shop-tokyo.19361/