See also https://asiamedals.info/threads/mountain-artillery-units-badges-and-watch-fobs.20380
Obverse
昭和七年五月山砲兵第九聯隊 - May 1932 Mountain Artillery 9th Regiment
凱旋記念 - Triumphant Return Commemorative
marked
純錫 - Pure Tin
Diameter 90 mm.
Height 30 mm.
Weight 64 g.
Obverse engraved
凱旋記念- Triumphant Return Commemorative
reverse engraved
昭和七年 - 1932
日支事変 - Japanese-China War /general term for the Manchurian Incident and Shanghai Incident/
蝶屋村 - Choya Village
Marked 純銀 - pure silver.