1 Cash - Thái Đức Thông Bảo, zinc

Thái Đức was the reign title of Nguyễn Nhạc, the eldest of the three Tây Sơn brothers whose rebellion dismantled Nguyễn lord control over southern Vietnam in the 1770s. Zinc cash — as opposed to the more conventional cast bronze — points to a regime operating under severe resource constraints, improvising with available metal rather than adhering to traditional alloy practice. The Tây Sơn mint infrastructure was never centralized in the way the later Nguyễn dynasty would establish at Huế.

The absence of a Barker reference number reflects how poorly documented Tây Sơn-era coinage remains in Western scholarship.