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1/2 Real 31/2 Libras- João I Lisboa mint
| Issuer | Portugal |
|---|---|
| Year | 1392-1397 |
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| Composition | Billon (.0833 silver) |
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|---|---|
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| Reverse description | Central field features a plain cross pattée dividing the inner circle into four quarters, each containing a small pellet or annulet, all within a beaded inner border. The design is austere and typical of billon coinage of the Aviz dynasty. The circumferential legend in uncial Latin letters reads +ADIVTORIVn nOSTRV, an abbreviated invocation of Psalm 123:8 ('Our help'), separated from the central motif by the beaded ring. |
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| Reverse lettering | +ADIVTORIVn nOSTRV |
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| Additional information |
João I's monetary reforms following the 1383–1385 dynastic crisis left Portugal with a fractured coinage system, and the half-real denominated in libras reflects the awkward transitional accounting of that moment — the libra as a unit of account was already becoming obsolete even as it appeared on new coin faces. The Lisboa mint was the dominant striking facility under the new Avis dynasty, though output quality varied considerably across the early reign.
Gomes J1.28 is among the more elusive types of the João I series in collectible condition, largely because the low silver content accelerated surface degradation in circulation.