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 japanese airdefensemaneuvers badge
airdefensemaneuvers badges
japanese airdefense badge
japanese airdefensemaneuvers badge
japanese airdefensemaneuvers participation badge
kantoairdefensemaneuvers
品川區防護團
関東防空演習参加記念章
防空演習記念章