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Real Branco - João I Porto mint
| Issuer | Portugal |
|---|---|
| Year | 1415-1433 |
| Type | Log in to see details |
| Value | Log in to see details |
| Currency | Log in to see details |
| Composition | Billon |
| Weight | Log in to see details |
| Diameter | Log in to see details |
| Thickness | Log in to see details |
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| Obverse description | Log in to see details |
|---|---|
| Obverse script | Latin |
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| Reverse description | Central field features the Portuguese royal arms: a quartered shield displaying the quinas (five escutcheons arranged in a cross) of Portugal, surmounted by a royal crown. The shield is set within a decorative frame or quatrefoil surround. A circular Latin legend encircles the design, identifying the king by his regnal title as King of Portugal and the Algarve. |
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| Additional information |
João I's reign coincided with the opening of Portugal's Atlantic expansion — Ceuta fell to Portuguese forces in 1415, the same year this emission began. Funding that campaign, and the military apparatus it required, placed considerable strain on the royal treasury and directly influenced the debased silver content that defines billon coinage of this period.
The Porto mint's output for this type is notably scarcer than Lisbon's, a persistent pattern across João I's reign reflecting the northern facility's more limited production capacity.