Obverse
剣 for 剣道 - Kendo
reverse
賞 - Awar
保善 - Hozen
剣道部 - Kendo Club
2590 - 1930
Watch fob was made by Aoki Buttons and Medals Works https://asiamedals.info/threads/badges-and-watch-fobs-made-by-aoki-buttons-and-medals-works-medaru.26266/
1930 hozen school kendo club badge
1930 hozen school kendo club watch fob
aoki buttons and medals works
badge made by aoki buttons and medals works
剣道部章
剣道部賞章
東京保善高等學校剣道部賞章