Obverse
興亜報國 - Asia Development Patriotic Service
東京府 - Tokyo Prefecture
reverse
自昭和十四年六月 - from June 1939
至昭和十四年九月 - to September 1939
記念章 - Commemorative Badge
興亜青年勤勞報國隊 - Asia Development Youth Labor Volunteer [Patriotic Service] Corps
東京部隊 - Tokyo Corps
Marked 純銀 - pure silver.
Original case.
Badges were manufactured by Oki Medal Company https://asiamedals.info/threads/badges-and-watch-fobs-made-by-oki-medal-company.23339/.