See also https://asiamedals.info/threads/1933-kanto-large-air-defense-maneuvers-takinogawa-ward-air-defense-corps-participation-commemorative-watch-fob.27515/ ;
Koishikawa Ward Air Defense Corps badges...
1933 kanto large air defense maneuvers badge
air defense corp branch badge
air defense maneuvers badge
imperial japan air defense badges
japanese air defense badge
japanese air defense maneuvers badge
koishikawa ward air defense corps badge
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