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| 正面描述 | 登录 以查看详情 |
|---|---|
| 正面文字 | Latin |
| 正面铭文 | 登录 以查看详情 |
| 背面描述 | 登录 以查看详情 |
| 背面文字 | 登录 以查看详情 |
| 背面铭文 | 登录 以查看详情 |
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| 铸币厂 | 登录 以查看详情 |
| 铸造量 | ND (1643) - Gomes# J4 117.01 - Over `Pataca` - ND (1643) - Gomes# J4 117.02 - Over Cruzado João IV (Error) - |
| 附加信息 |
In 1643, the Portuguese crown faced a chronic shortage of large silver denominations following the 1640 restoration of independence from Spain. Rather than strike new coinage outright — the mints lacked the capacity — João IV ordered that circulating Spanish colonial 8 reales be countermarked and revalued at 480 réis for legal tender in Portugal. The host coins were typically cob-struck pieces from Mexico City, Potosí, or Lima, meaning the planchet quality beneath the punch varies enormously.
The countermark itself is the authentication; the host coin's origin is incidental.