
Marine Timekeeper known as 'H5' by John Harrison and Son 1770
1770
1770
1775
1066; 1876
1780
1776-1780
1776-1780
1776-1780
1770-1780
2000-100 BCE
1778
1642-1649 (original); 1883 (model)
1770
1769
1776
1767
1765-1775
1778-1780
1776-1780
1776-1780
1780
1770-1775
1766
4000-2001 BCE
1775
1776
1765
1705-1737
1772
1775
1775
1780
1771
1990-95
1769
1668; 1924
1770-1780
1730-1760 (original); 1931-1939 (replica)
1936
1845-1964
1775
1774
1775
1765-1775
3000-1500
1770
1774
1772
1776
circa 1800 BCE
1775