| Issuer | Brazil |
| Year | 1781 |
| Type | Coin pattern |
| Value | 6400 Réis |
| Currency | Real (1654-1799) |
| Composition | Silver |
| Weight | |
| Dimensions | 31.5 mm |
| Thickness | |
| Shape and Technique | Round |
| Orientation | |
| Engraver(s) | |
| In circulation to | |
| Reference(s) |
| Obverse description | Conjoined busts of Maria I and Peter III, united and facing right. Date and mintmark below. |
| Obverse script | Latin |
| Obverse lettering | MARIA.I.ET.PETRUS.III.D.G.PORT.ET.ALG.REGES
(year)_R (Translation: Maria I and Peter III, by the Grace of God, Regents of Portugal and Algarves.) |
| Reverse description | Royal arms of Maria I and Pedro III. |
| Reverse script | |
| Reverse lettering | |
| Edge | |
| Mint | R Casa da Moeda do Brasil, Rio de Janeiro, Brazil (1694-date) |
| Mintage | 1781 R - KM #Pn7 - |
| Catalog ID | 8345458020 |
| Comments |
