1/2 Baht - Rama V Copper Pattern, Coin alignment, Reeded edge

Rama V — Chulalongkorn — ascended the throne in 1868 at age fifteen, and the years immediately following saw the Siamese court navigating intense pressure from European colonial powers while attempting to modernize its institutions, currency among them. These copper patterns from 1869 belong to that experimental phase, when Western minting technology and coinage formats were being tested against a monetary system still rooted in bullet coins and traditional weights. Most pattern survivors from this period exist in only a handful of known examples.

The coin alignment and reeded edge distinguish this from related pattern strikings of the same type, suggesting deliberate variation across the trial series to evaluate different production specifications.