3 Vintens - Pedro II Porto mint

The Porto mint operated intermittently and under chronic pressure during Pedro II's reign, partly because Lisbon's Casa da Moeda could not alone service the volume demands created by Brazil's expanding colonial trade circuits. The vintém, worth twenty réis, was the workhorse denomination of everyday Portuguese commerce, and the three-vintém piece struck at Porto filled a persistent gap in small silver availability across both metropolitan and Atlantic markets.

Pedro II's reign also coincided with the Methuen Treaty negotiations concluded just before his death in 1706, which restructured Anglo-Portuguese trade and had downstream effects on silver coinage demand.