| Country | 🇬🇧 United Kingdom |
| Year | 1788 |
| Denomination | 1 Guinea (21⁄20) |
| Face value | 1p |
| Mint | Royal Mint · Llantrisant |
| Circulation | Circulating |
| Composition | Brass |
| Weight | 2.000g |
| Diameter | 21.0mm |
| Thickness | 0.75mm |
| Shape | Round |
| Orientation | Medal alignment ↑↑ |
| Grade scale | UK (EF/UNC) |
Laureate bust facing right, surrounded by text. Script: Latin
Coat of arms surrounded by text. Script: Latin