Obverse
交通 - Traffic
優良章 - Badge of Excellence
reverse
兵庫縣 - Hyogo Prefecture
交通安全協會 - Traffic Safety Association
Marked 純銀 - pure silver.
Original case.
Badge was made by
永樂堂 - Eirakudo https://asiamedals.info/threads/badges-and-watch-fobs-made-by-eirakudo-workshop.28385/
in
神戶市 - Kobe City