See also https://asiamedals.info/threads/1936-army-special-large-maneuvers-in-hokkaido-imperial-visit-guard-commemorative-case-keesu.24162/ In the center of obverse 衛 - Security Guard /衛 - to guard; to protect; to defend/ reverse 昭和拾壹年 - 1936 陸軍特別大演習竝地方行幸 - Hokkaido Army Special Large...
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