Award Cufflinks for Loyal Military Service from Nippon Life Insurance Company Taiko Association/日本生命陣太鼓会赤心従軍賞カフスボタン

Emblem of Nippon Life Insurance Company.

日本生命陣太鼓會 - Nippon Life Insurance Company Taiko Association

皇紀二五九七年 - 1937

赤心従軍賞 - Award for Loyal Military Service

Marked with 950銀 = 950 silver and Hattori workshop mark "Marlet" https://asiamedals.info/threads/history-labels-i-marks-of-hattori-watch-shop-tokyo.19361/