Badge with similar design https://asiamedals.info/threads/1936-air-defense-maneuvers-tanabe-air-defense-corps-participation-commemorative-badge.25189/
Obverse
護 - Protection
錦防護分團 - Nishiki Air Raid Defense Corps Branch
reverse
昭和十二年度 - 1937
防空演習参加記念章 - Participation in Air Defense...
1934 kishiwada city air raid defense corps badge
1934年岸和田市防護團章
airdefensemaneuversbadgeairdefensemaneuversbadges
badge made by hinode medal works
hinode medal works
japaneseairdefensemaneuversbadge
ヒノデ徽章製作所
岸和田市防護團章
昭和九年七月岸和田市防護團章
防護團章
Badge size varies between 18 and 20 mm.
"Early" badges.
1st variation.
Reverse
賛助員會章 - Supporting Member of Association Badge
財團法人 - Foundation
大日本防空協會 - Dainippon Air Defense Association
Hot enamel + light metal alloy.
Original case.
Size 55 x 45 mm.
Another example of 1st...
dainippon airdefense association
dainippon airdefense association badge
great japan airdefense association
great japan airdefense association badge
greater japan airdefense association badgejapaneseairdefense association badgejapaneseairdefensebadgejapaneseairdefensemaneuversbadge
supporting member badge
大日本防空協会
大日本防空協会徽章
賛助会員章