1 Cash - Trị Nguyên Thông Bảo

Lê Văn Khôi seized the Gia Định citadel in 1833 with a force that eventually swelled to include disaffected Vietnamese, Chinese migrants, and Catholic collaborators sheltered under French missionary influence. The rebellion controlled much of southern Vietnam for nearly three years before imperial Nguyễn forces retook the citadel in 1835 after a brutal siege. Coins struck under the rebel administration are among the rarest Vietnamese cash issues — not because mintages were necessarily small, but because the Nguyễn court systematically suppressed all material traces of the revolt following its suppression.

The Trị Nguyên reign title used on this issue has no recognized Nguyễn imperial counterpart, making attribution unambiguous.