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
airdefensemaneuversbadges
japanese airdefense badge
japanese airdefensemaneuvers badge
japanese airdefensemaneuvers participation badge
kanto airdefensemaneuvers
品川區防護團
関東防空演習参加記念章
防空演習記念章
Supporting Member Badge.
Beautifully enamelled badge in silver.
Obverse
国防 - National Defense
reverse
関門北九州六市國防協會 - Kanomon Northern Kyushu 6 Cities National Defense Association
賛助會員 - Supporting Member