See also https://asiamedals.info/threads/army-flight-school-meteorology-class-graduation-watch-fobs.24295/ ; https://asiamedals.info/threads/1940-army-meteorological-department-7th-class-of-technical-personnel-graduation-commemorative-watch-fob-1940.29639/.
Private collection. Photos courtesy...
advanced meteorology class graduation watch fob
army flight school graduation watch fob
japanese army advanced meteorology class badge
陸軍等高科気象術練習生卒業記念章
