
George III's weighted cylinder
1762
1762
1762
1761
1762
1762
1761
1762
1762
1762
1762
1762
1765
1761
1775-1795
1762
1761
1761
1761-1762
1790
1789-1795
1780
1762
1762
1740-1750
1761
1761
1734-1795
1738
1761
1745-1753
1762
1762
1762
1787-1800
1761
1761
1761
1761
1762
1762
1761
1762
1762
1761
1762
1762
1762