1 Décimo

Chile's decimal coinage reform of 1851 replaced the colonial real system with a peso divided into 100 centavos, the décimo sitting at one-tenth of that unit. The transition was administratively messy — old reales and new decimal pieces circulated simultaneously for years, and the public was slow to abandon familiar fractions.

Santiago was the sole mint producing these throughout the series run, identifiable by the "So" assayer marks that shift across the decade as different assayers held the position.