The exact attribution of this rare badge remains unknown.
Specimen from a personal collection.
Height 43.22 mm.
Width 44.70 mm.
Weight 24.56 g.
Obvious roots of naïve attribution.
Reverse
2596 = 1936
卒業記念 - Graduation Commemorative
熊谷陸軍飛行学校 - Kumagaya Army Flight School
第二期操縦生徒 - 2nd Class of Pilot Trainees (school was established in 1935)
Engraved
齋藤 - Saitō
imperial japan army badge
imperial japan army pilotbadgejapanese 2nd class pilotbadgejapanese army pilotbadgejapanese nco pilotbadgejapanesepilotbadge
熊谷陸軍飛行学校卒業記念章
第二期操縦生徒熊谷陸軍飛行学校卒業記念章
imperial japanese army watch fob
japanesebadge case label
japanese imperial air force badgejapanese imperial army badgejapanese imperial army watch fob
japanesepilotbadgejapanesepilotbadge watch fob
watch fob in the form of japanesepilotbadge
japanese army pilotbadgejapanesepilotbadge
photo japanese officer
photo of japanese nco pilot
photo of japanese officer
photo of japanese officer with pilotbadge
photo with japanese army pilotbadge
との写真日本陸軍パイロットバッジ
との写真飛行機操縦徽章
陸軍飛行機操縦徽章
Reverse
偵察第八十二期 - Reconnaissance 82nd Class
Engraved
大岩 - Ōiwa (second kanji could be typo see https://asiamedals.info/threads/graduation-commemorative-watch-fobs-of-utsunomiya-army-flight-school.23736/)
Original case.
下士官操縦徽章 - NCO Pilot Badge.
22nd class fellowship association badge
22nd officer's class fellowship association badge
imperial japan army commander badgejapanese army badgejapanese commander badgejapanesepilotbadge
将交第二十二期生会章