
Marine Timekeeper known as 'H5' by John Harrison and Son 1770
1770
1770
1770
1769
1767
2000-100 BCE
1705-1737
1771
4000-2001 BCE
1642-1649 (original); 1883 (model)
1936
1990-95
1610; 1923
1668; 1924
1960-1979
1767
1767
1769-1770
1767
1767
1767
1770
30 CE
30 CE
1771
2686-2613 BCE
1770
1888-185
1945-50
1767-1771
1770
2000-1350
2000-1350
2000-1350
2000-1350
2000-1350
2000-1350
30-200
2000-1350
20-500
2000-1350
2000-1350
2000-1350
20-500
2000-1350
1850-1350
1769
1940-1050
2000-1000
3500-1000
100 BCE-300 CE; 1890-1920