1 Cash - Thành Thái Thông Bảo

Thành Thái took the throne at ten years old in 1889, installed by the French Résident Supérieur after the exile of his predecessor Đồng Khánh. The Board of Revenue Mint at Huế continued casting zinc and brass cash under his reign largely as a formality — French colonial currency was already displacing traditional Vietnamese coinage in commercial transactions throughout Cochinchina and pushing steadily northward into Annam.

Thành Thái was eventually deposed in 1907 after French authorities deemed him mentally unfit, a diagnosis widely regarded as political pretense following his attempts to resist colonial control.