See also another badge with similar design https://asiamedals.info/threads/1936-yokohama-city-naka-ward-air-defense-corps-officer-preparatory-training-badge-a.27535/
Specimen from the collection of Raymond LaBar. Photos courtesy of the owner.
Reverse
關東防空大演習参加記青木聯合會 - Kanto Large Air...
1933 kanto large air defense badgebadgemadebynaigaimedalworks
imperial japan air defense badges
japanese air defense association badge
japanese air defense badge
japanese air defense maneuvers badge
昭和八年八月關東防空大演習参加記青木聯合會章
關東防空大演習参加記章
1st variation.
Obverse
南軍司官白川大将 - South Army Commander General Shirakawa https://en.wikipedia.org/wiki/Yoshinori_Shirakawa
北軍司官白井上大将 - North Army Commander General Inoue https://en.wikipedia.org/wiki/Sadae_Inoue
reverse
陸軍特別大演習 - Army Special Large Maneuvers
参加記念章 - Participation...
1929 army large special maneuvers badge
1929陸軍特別大演習参加記念章
army maneuvers badges
badgemadebynaigaimedalworks
japanese army maneuvers badge
japanese imperial army badge
japanese maneuvres badge
japanese military badge
maneuvers participation commemorative badgenaigaimedalworks
watch fob madebynaigaimedalworks
昭和四年拾壱月陸軍特別大演習参加記念章
陸軍特別大演習参加記念章
陸軍特別大演習章
badgemadebynaigaimedalworksbadgemadebynaigaiworkshop
manufacturer of japanese awards
manufacturer of japanese badge
manufacturer of japanese sake cup
manufacturer of japanese watch fob
naigaimedalworksnaigaiworkshop
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内外徽章製作所第拾回国際オリムピック競技大会