
Marine Timekeeper known as 'H5' by John Harrison and Son 1770
1770
1770
1769
1771
1764
1760-1770
1762
1760
1762
1770
1762
1762
1769
1761
1762
1762
1761
1762
1762
1762
1762
1767
1767
2000-100 BCE
1770
1990-96
1771
1765
1761
1705-1737
1760
1761
1761
1762
1762
1762
1763
1761
1761
1761
1761
1772
1766
1761-1762
4000-2001 BCE
1760-1772
1772-1773
1772 (original); 1919 (model)
1610; 1923
1642-1649 (original); 1883 (model)
1668; 1924