1 Cash - Đại Trị Nguyên Bảo, Grass script

Issued under Trần Dụ Tông, whose reign was marked by administrative neglect and a court increasingly consumed by factionalism, these cash coins were produced during a period when the Trần dynasty was visibly losing its grip on the Red River Delta. The "grass script" rendering of the inscription — a more cursive, abbreviated form — distinguishes this variety from the standard clerical-script emissions and points to different die-cutting hands within the same mint operation.

Toda's original classification left several die variants unresolved, and Hartill's 25.4 attribution captures only part of the known range. The square central hole placement and flan preparation show considerable inconsistency across surviving examples.