XX Réis 'Vintem' - João IV Lisboa mint

João IV struck these small silver pieces immediately after the 1640 restoration of Portuguese independence from Habsburg rule — the vintem was among the first coinage issued under the newly proclaimed Braganza dynasty, a deliberate assertion of monetary authority after sixty years of Iberian Union. The Lisboa mint had continued operating under Philip III of Portugal (Philip IV of Spain), so the physical infrastructure was inherited; what changed was the crown above it.

The seven Gomes reference numbers reflect die variations accumulated across a fifteen-year emission rather than distinct subtypes, which complicates precise attribution for individual pieces.