Vintem - Manuel I p M o, Porto mint

Manuel I inherited a treasury flush with revenue from the newly opened sea route to India, and the monetary reforms he enacted shortly after his 1495 accession reorganized Portuguese silver coinage along more rationalized weight standards. The vintem — twenty reais — became the workhorse denomination of Atlantic trade, moving through Lisbon's commercial networks and, increasingly, along the African and Brazilian coasts as Portuguese influence expanded.

The Porto mint struck these under royal license but with its own die-cutting traditions, which accounts for the stylistic divergence between Gomes E1 33 and E1 34 — the two catalogued varieties differing principally in the form of the mint mark and minor legend spacing.