George III's pendulum
1762
1762
1761
1761
1762
1762
1762
1762
1762
1762
1769
2000-100 BCE
1762
1762
1764
1762
1986 (replica); 1501-1600 (original)
1761
1762
1761
1761
1990-96
1761
1705-1737
1762
1761
1760
1763
1761-1762
1761
1765
1762
4000-2001 BCE
1769
1761
1888-185
1767
1760-1764
1760
1767
1764
1765
1763
2000-1350
1972-3
1769
1765-1769
1945-50
1990-95
1761
1761