
Marine Timekeeper known as 'H5' by John Harrison and Son 1770
1770
1770
1769
1767
1767
1764
1770
2000-100 BCE
1771
1770
1990-96
1772
1771
1765
1772 (original); 1919 (model)
1772-1773
1705-1737
1766
4000-2001 BCE
1769
1936
300 BCE; 1905-1915
1770
1774
1772
1770
1773
1773
1774
1774
1773
30 CE
1774
30 CE
1772
1774
1771
1770
1767-1771
1772
1770
20-400
30-200
20-500
20-500
1769
1972-3
1990-95
1772
15/7/27
1770