
Marine Timekeeper known as 'H5' by John Harrison and Son 1770
1770
1770
1762
1762
1762
1769
1762
1762
1762
1762
1762
1762
1762
1767
1767
1764
1770
2000-100 BCE
1771
1770
1990-96
1762
1762
1762
1763
1772
1771
1765
1772 (original); 1919 (model)
1772-1773
1705-1737
1766
4000-2001 BCE
1769
1936
300 BCE; 1905-1915
1762
1762
1770
1774
1772
1770
1763
1773
1763
1773
1774
1774
1773
30 CE
1762