1 Lat 1 Tamlung

Lan Xang's billon issues of this period circulated during the reign of Mahosena, a time when the kingdom was navigating increasingly aggressive pressure from the Burmese Toungoo dynasty to the west. The heavy weight of this piece reflects a monetary tradition rooted in weight-based exchange rather than face-value convention — the "tamlung" being a unit of mass before it was ever a denomination.

Billon use here signals deliberate debasement of what had been higher-silver issues, likely tied to military expenditure during decades of near-continuous conflict along the Mekong corridor.