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Real of 10 soldos - João I Big disk, Porto mint
| Issuer | Portugal |
|---|---|
| Year | 1385-1397 |
| Type | Log in to see details |
| Value | Real de 10 Soldos = 120 Dinheiros |
| Currency | Log in to see details |
| Composition | Log in to see details |
| Weight | Log in to see details |
| Diameter | Log in to see details |
| Thickness | Log in to see details |
| Shape | Log in to see details |
| Technique | Log in to see details |
| Orientation | Log in to see details |
| Engraver(s) | Log in to see details |
| In circulation to | Log in to see details |
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| Obverse description | Log in to see details |
|---|---|
| Obverse script | Latin (uncial) |
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| Reverse description | Log in to see details |
| Reverse script | Log in to see details |
| Reverse lettering | Log in to see details |
| Edge | Plain |
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| Mintage | Log in to see details |
| Additional information |
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.