Silvered variation.
Obverse
皇國 - Imperial Country
reverse
非常時 - Emergency [time of emergency]
海軍大演習 - Navy Large Maneuvers
参加記念章 - Participation Commemorative Badge
1934
Stamped with
大井 - Ōi.
Ōi was the fourth of five Kuma-class light cruiser, which served in the Imperial Japanese...