1941 Army Aviation Signal School Youth Airmen 4th Class Graduation Commemorative Watch Fob/1941年陸軍少年飛行兵第四期陸軍航空通信学校章

Nicely designed watch fob after army pilot badge https://asiamedals.info/forums/army-pilot-badges.613/

Obverse

無線 - Wireless

reverse

皇紀2601年 - 1941

陸軍少年飛行兵第四期 - Army Youth Airmen 4th Term/Class

陸軍航空通信學校 - Army Aviation Signal School

Engraved

氏名岡村三四吉 - Full name: Sanshikichi Okamura

Details.