Watch fob with similar design of obverse https://asiamedals.info/threads/1936-army-large-special-maneuvers-participation-commemorative-badge.24259/
Reverse
出征記念 - Dispatch Commemorative
間島臨時派遣隊 - Jiandao Temporary Expeditionary Force
琿香支隊 - Houka Detachment
After the Mukden Incident of...
