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| 正面描述 | Central field features the denomination numeral '80' in large characters, with the date below and the mint mark letter 'B' (for Bahia) beneath it, all enclosed within an open wreath of oak branches tied at the base. A royal crown surmounts the wreath at the top of the field. The peripheral legend reads JOANNES VI D G PORT BRAS ET ALG REX, arranged around the full circumference, identifying João VI as King of Portugal, Brazil and the Algarves. |
|---|---|
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| 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 | Latin |
| 背面铭文 | 登录 以查看详情 |
| 边缘 | 登录 以查看详情 |
| 铸币厂 | 登录 以查看详情 |
| 铸造量 | 登录 以查看详情 |
| 附加信息 |
João VI issued this denomination from both Lisbon and Rio de Janeiro simultaneously — an administrative oddity that reflected the peculiar reality of a European monarchy governing from its colonial capital after the French invasion of Portugal in 1807. The Brazilian-struck pieces and Lisbon pieces circulated interchangeably across the Atlantic empire, though collectors have long noted subtle die differences between the two mints that the KM listing largely flattens into a single type.
João only returned to Lisbon in 1821 under constitutional pressure, ending the Rio mint's brief role as a royal production center.