1st variation "silvered".
Obverse
撃 - attack; fight
Reverse
支那事変出動記念 - China Incident Dispatch Commemorative
長谷川部隊道丸盛隊 - Hasegawa Corps, Michimaru Unit
皇紀2597年 - 1937
2nd variation "blackened ".
Cased specimen manufactured by Yamazaki Medal Works /
山崎徽章製作所/ and dated (inside the case) July 7, 1938.
記念 - Commemorative
長谷川部隊道丸盛隊 - Hasegawa Corps, Michimaru Unit