Various notched duty marks used
6 Jul 1797 - 28 May 1798
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| 1559 |
| 1579 |
| 1599 |
| 1619 |
| 1639 |
| 1659 |
| 1679 |
| 1697 |
| 1717 |
| 1737 |
| 1757 |
| 1777 |
Various notched duty marks used 6 Jul 1797 - 28 May 1798 | 1797 |
| 1817 |
| 1837 † |
| 1857 |
| 1877* |
| 1897* |
| 1917* |
| 1937* |
| 1957 |
| 1976 |
| 2001* |
| 2026 |
* = multiple images
† Reference books claim that a Victoria duty mark was used with the 1837/38 date letter B from 21 Jun 1837 to 28 May 1838. This appears to be incorrect with the William IV duty mark used throughout.