Tostão - João IV 1st series, Lisbon
€1.00
| Issuer | Portugal |
| Year | 1641 |
| Type | Standard circulation coin |
| Value | 1 Teston (Tostão) (100) |
| Currency | Real (1517-1835) |
| Composition | Silver (.9167) |
| Weight | 8.2 g |
| Dimensions | 28 mm |
| Thickness | |
| Shape and Technique | Round (irregular) Hammered |
| Orientation | Variable alignment ↺ |
| Engraver(s) | |
| In circulation to | |
| Reference(s) | Gomes#J4 65 |