This design was used for badges issued by Shitaya Ward to participants of air defense maneuvers in Kanto area during 1930s.
In 1936 badge with similar design was commissioned by Arakawa Ward Air Raid Defense Corps...
1933
1933 kanto air defense maneuvers badge
1937
air defense
air defense maneuvers badges
imperial japan badge
japanese air defense badge
kanto air defense maneuvers
shitayawardbadges
下谷區防護團
参加記念章
昭和八年八月関東防空大演習参加記念章
関東防空演習