8 Reales - Carlos III

Carlos III's monetary reforms of 1772 mandated the milled portrait coinage across all Spanish American mints, replacing the cob-style macuquinas that had dominated colonial currency for over a century. Guatemala's mint — established in Santiago de los Caballeros before the 1773 earthquake forced the city's relocation — was among the slower adopters, still working through transitional issues into the mid-1780s.

The KM#36.2a designation reflects a specific assayer variation within the Guatemala series, a detail that matters considerably for date attribution given how few die combinations were produced across 1786–87.