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George III's pendulum
1762
1762
1783
1785
1785
1748-1763
1785
1758-1773
1758-1769
1758-1769
1760-1770
1758-1769
1769
1755
1750-1760
2000-100 BCE
1761
1761
1776
1784
1762
1784
1762
1762
1762
1752
1752
1762
1755
1745-1755
1750
1777-1785
1778
1782
1787
1764
hallmarked 1788
1762
1762
1770
1742
1775-1785
1781-1790
1745-1755
1745-1755
1776-1780
1776-1780
1776-1780
1750-1770
circa 1750
1755