See also https://asiamedals.info/threads/1933-kanto-large-air-defense-maneuvers-koishikawa-ward-air-defense-corps-participation-commemorative-badge.25039/
Size 34.5 x 30.5 mm.
Thickness 2.6 mm.
Obverse
關東防空大演習記念 - Kanto Large Air Defense Maneuvers
参加章 - Participation Badge
reverse...
1933 kanto large airdefense maneuvers watchfob
1933年関東防空演習参加章
badge made by naigai medal works
japanese airdefense badge
japanese airdefensecorps badge
japanese airdefense maneuvers badge
naigai medal works
takinogawawardairdefensecorps badge
takinogawawardairdefensecorpswatchfob
内外徽章製作所
昭和8年関東防空演習参加章
瀧野川區防護團關東防空大演習参加メダル
瀧野川區防護團關東防空大演習参加章
関東防空演習参加メダル
關東防空大演習参加章