1 Att / 1/8 Fuang - Rama IV Copper Pattern

Rama IV — Mongkut — commissioned Western-style machine-struck coinage in the early 1860s as part of a deliberate effort to modernize Siam's monetary system and signal parity with European trading partners pressing hard on the kingdom's borders. This copper piece is a pattern, meaning it never entered circulation; it was produced to test designs and gauge foreign and domestic reaction before committing to a full issue. The Royal Mint in London and the Birmingham firm of Ralph Heaton & Sons were both involved in producing Siamese pattern coinage during this period, and attribution between them is not always clean.