1 Att / 1/8 Fuang - Rama IV

Rama IV — Mongkut — established the Royal Siamese Mint in the early 1860s partly to displace the centuries-old bullet coinage system, which foreign trading partners found impossible to reconcile with modern commercial accounting. This tin piece was among the earliest machine-struck issues from that transition, produced with equipment sourced from Britain as Siam modernized its monetary infrastructure under sustained pressure from European trade interests.

Tin was not an arbitrary choice — Siam sat atop some of the world's most productive tin deposits, and the metal carried genuine domestic monetary logic even as silver dominated international exchange.