1 Real of 31/2 Libras - João I Porto mint
€100,352.00
| Issuer | Portugal |
| Year | 1398-1408 |
| Type | Standard circulation coins |
| Value | 31/2 Libras = 70 Soldos = 840 Dinheiros |
| Currency | Libra (2nd Dinasty, 1383-1415) |
| Composition | Billon (.125 silver) |
| Weight | 2.6 g |
| Dimensions | 25 mm |
| Thickness | |
| Shape and Technique | Round (irregular) Hammered |
| Orientation | |
| Engraver(s) | |
| In circulation to | |
| Reference(s) | Gomes#J1 56.xx to 59.01 |