This piece began life as a Portuguese cruzado, then worth 400 réis, before being countermarked by royal decree to raise its forced tariff to 500 réis — one of several emergency currency manipulations João IV employed to finance Portugal's prolonged war of restoration against Spain following independence in 1640. The countermark allowed the Crown to extract additional value from existing coinage without the expense of a full reminting operation.
By 1663, João IV had been dead for seven years. The countermarking continued under the regency and into Afonso VI's reign, meaning the attribution to João IV reflects the original host coin's authority, not the countermarking moment itself.
This piece began life as a Portuguese cruzado, then worth 400 réis, before being countermarked by royal decree to raise its forced tariff to 500 réis — one of several emergency currency manipulations João IV employed to finance Portugal's prolonged war of restoration against Spain following independence in 1640. The countermark allowed the Crown to extract additional value from existing coinage without the expense of a full reminting operation.
By 1663, João IV had been dead for seven years. The countermarking continued under the regency and into Afonso VI's reign, meaning the attribution to João IV reflects the original host coin's authority, not the countermarking moment itself.