See also https://asiamedals.info/threads/army-large-special-maneuvers-committee-member-badge.23523/
Size 53 mm.
Obverse
Osaka city emblem.
Marked
花十三製 - made by Hana Jūzō [13 flowers] workshop.
Original case.
陸軍特別大演習 - Army Large Special Maneuvers
委員徽章 - Committee Member's Badge...
army large special maneuvers osaka badge
imperial japanese army maneuvers badge
japanese army badge
japanese army large special maneuvers badge
japanese army maneuvers badge
花十三製
陸軍特別大演習大阪市委員徽章
陸軍特別大演習章