Reverse
昭和七年陸軍特別大演習大阪府委員章 - 1932 Army Special Large Maneuvers Committee Member Badge
大阪府 - Osaka Prefecture
Marked
純銀 - Pure Silver
SBD for 尚美堂 /Shobido/ workshop https://asiamedals.info/threads/mark-on-japanese-orders-who-and-when.25816
Original case with Shobido label inside.