What happended in 1691?
The dual Monarchs are William III and Mary II. Pope Innocent XII succeeds Alexander VIII. A new royal charter for Massachusetts, now including Maine and Plymouth. Thomas Neale (who was then Master of the Mint) is granted an English patent for the American postal service.
| Obv | Rev | Cat | Coin |
|---|---|---|---|
 |  | Crowns | 1691 Crown William and Mary |
 |  | Guineas | 1691 Guinea - William and Mary |
 |  | Half-Crowns | 1691 Half Crown - William and Mary |