Badge with a similar design https://asiamedals.info/threads/1933-kanto-air-defense-maneuvers-shitaya-ward-air-raid-defense-corps-commemorative-badge.24805/
Badge in mint condition.
Obverse
帝都 - Imperial Capital (i.e. Tokyo)
防護 - Air Raid Defense/Protection
Well-worn specimens.
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帝都防護章