1 Quarto - Isabella II

The Philippine quarto series of the 1830s was struck under Spanish colonial authority at the Manila mint, which had reopened in 1829 after a long dormancy. These copper pieces circulated heavily among the lower-denomination transactions of the local economy, and the Manila mint's chronic difficulties with copper planchet quality during this decade produced frequent surface irregularities that are endemic to the type rather than indicative of post-mint damage.

Isabella II was only four years old in 1835, ruling nominally through her mother María Cristina as regent — a regency that itself depended on the support of the liberal faction against the Carlist claimants then fighting in the Spanish mainland.