
Marine Timekeeper known as 'H5' by John Harrison and Son 1770
1770
1770
2000-100 BCE
1770
1769
4000-2001 BCE
1705-1737
1772
1771
1642-1649 (original); 1883 (model)
1936
1990-95
1610; 1923
1668; 1924
1960-1979
1769-1770
1772
1772
1770
1773
1773
1774
1774
1773
30 CE
1774
30 CE
1772
1774
1771
2686-2613 BCE
1770
1888-185
1945-50
1772
1770
2000-1350
2000-1350
2000-1350
2000-1350
2000-1350
2000-1350
30-200
2000-1350
20-500
2000-1350
2000-1350
20-500
1769
1940-1050
2000-1000