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| 正面描述 | Central field displays the royal cipher 'IhnS' (monogram of João I) surmounted by a crown, with the Porto mint letter 'P' positioned below. The design is arranged within a quartered shield-like composition, with Portuguese quinas (escutcheons of five bezants) visible in the quadrants, all enclosed within a double linear inner circle. The outer legend, rendered in uncial Latin characters, runs between two concentric circles. Secret symbols may appear to either side of the crown depending on the die variety. |
|---|---|
| 正面文字 | 登录 以查看详情 |
| 正面铭文 | ADIVTORIVM NOSTRVN QVI FEC IT CELVM ET TERAN IhnS P (or ºPº ) |
| 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 |
| 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 I's claim to the throne was contested from the moment he was acclaimed king at Coimbra in April 1385, and the coinage issued from Porto in the years immediately following reflects the monetary chaos of a kingdom that had just fought off Castilian invasion at Aljubarrota. The Porto mint operated with considerable autonomy during this period, producing issues that diverged meaningfully from Lisbon output — the so-called "big disk" fabric being one such divergence, with a broader flan relative to die size that distinguishes Porto production from contemporaneous pieces.
Billon coinage of this reign is notoriously variable in silver content, a consequence of wartime treasury strain rather than deliberate debasement policy.