10 Cash - Duy Tân Thông Bảo

Duy Tân, installed on the throne by the French Résidence Supérieure in 1907 at age seven following the forced abdication of his father Thành Thái, was himself deposed and exiled to Réunion in 1916 after participating in a failed anti-colonial uprising coordinated with Phan Bội Châu's network. The cash coinage struck under his reign name thus brackets the entirety of his Vietnamese rule — from childhood puppet emperor to convicted conspirator — in under a decade.

Production of square-holed cast brass cash had been in steep decline across the region by this period, with French Indochinese milled coinage increasingly displacing traditional issues in everyday exchange. These pieces circulated primarily in rural and ceremonial contexts.