japanese navy aviation graduation watch fob

See also https://asiamedals.info/threads/16th-advanced-course-of-aviation-weaponry-aerial-photography-graduation-commemorative-watch-fob-2603.27189/ Obverse 高雷爆 - Advanced [Course in] Explosives reverse 皇紀2603年 - 1943 第十六期高等科航空兵器術 - 16th Advanced Course of Aviation Weaponry 雷爆練習生卒業記念 -...

Obverse 乙飛17 - 17th B-Class Flight 2604 - 1944 reserve 乙種第十七期 - B-Class [Flight Reserve Trainee] 17th class 飛行豫科練習生 - Flight Reserve Trainee Program (飛行予科練習生/Hikō Yoka Renshū-sei) a.k.a. Yokaren (予科練) 卒業記念- Graduation Commemorative In 1928, a new program was created to enable civilian...

Obverse 雷爆 - Explosives reverse 皇紀2602年 - 1942 大東亜戦争記念 - Greater East Asian War Commemorative 第十五期高等科航空兵器整 - 15th Advanced Course of Aviation Weaponry 雷爆練習生卒業記念 - Explosives Trainee Graduation Commemorative

Obverse 高雷爆 - Advanced Course in Explosives /Depth Charge/ reverse 皇紀2603年 - 1943 第十八期高等科 - 18th Advanced Course 兵器整備術 - Weapon Maintenance 雷爆練習生卒業記念 - Explosives /Depth Charge/ Trainee Graduation Marked 純銀 - pure silver.

See also https://asiamedals.info/threads/16th-advanced-course-of-aviation-weaponry-1943-graduation-commemorative-watch-fob-2603.27208/ Obverse 寫眞 - Photograph reverse 皇紀2603年 - 1943 第十六期高等科航空兵器術 - 16th Advanced Course of Aviation Weaponry 寫眞練習生卒業記念 - Photo Trainee Graduation...

Obverse 射爆 - Bombing reverse 皇記2601年 - 1941 第十二期高等科航空兵器術 - 12th Advanced Course of Aviation Weaponry 射爆練習生卒業記念 - Bombing Trainee Graduation Commemorative Detail. Watch chain.

Obverse 射高 - Shooting and Bombing Course reverse 皇紀2603年 - 1943 第十六期高等科航空兵器術 - 16th Advanced Course of Aviation Weaponry (射爆)卒業記念 - (Firing [of weapons] and Bombing) Graduation Commemorative Marked 純銀 - pure silver.

See also https://asiamedals.info/threads/7th-class-of-yokaren-program-graduation-commemorative-watch-fob.29020/ Obverse 飛 - Flight reverse Yokaren emblem. 卒業記念 - Graduation Commemorative 第七期飛行練習生 - 7th Class Flight Trainee Details.