Obverse
参加章 - Participation Badge
reverse
特命検閲 - Special Censorship https://ja.wikipedia.org/wiki/特命検閲
昭和六年五月 - May 1931
帝国在郷軍人會 - Imperial Military Reservist Association
富山支部 - Toyama Branch
Marked ウスキ for ウス時計店 - Usuki Watch Shop
Badges and Watch Fobs made by Usuki Watch Shop/ウスキ時計店
Workshop from Toyama City known for its Imperial Reservists Association badges and watch fob. Mark.
asiamedals.info
Rare original paper wrapper.