See also https://asiamedals.info/threads/army-aviation-maintenance-school-18th-b-class-yokaren-program-graduation-watch-fob.29237/
Size 54.5 x 53.2 mm.
Obverse
航整 for 航空整備 - Aircraft Maintenance
reverse
2001 - 1941
陸軍航空整備學校 - Army Aviation Maintenance School
第十八面乙種生 - 18th class...
18th b-class yokaren program graduation watch fob
1941 army aviation maintenance school watch fob
1941年陸軍航空整備学校第十八面乙種生章
japanese army aviation badge
japanese army aviation school graduation badge
yokaren program graduation watch fob
皇紀2601年陸軍航空整備学校第十八面乙種生章
