From 15 July 1797 for 9 months a doubled duty mark was
used to signify the doubling of duty on silver
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Platinum jubilee mark optional
From 15 July 1797 for 9 months a doubled duty mark was used to signify the doubling of duty on silver | 1797* |
| 1817* |
| 1842* |
| 1865 |
| 1890 |
| 1915 |
| 1940 |
| 1965* |
| 1997 |
Platinum jubilee mark optional | 2022 |
* = multiple images
