
Marine Timekeeper known as 'H5' by John Harrison and Son 1770
1770
1770
1760-1775
1775
1066; 1876
circa 1750
1762
1750
1755
1762
1762
1752
1761
1762
1762
1762
1762
1752
1770
1750-1760
1755
1769
1757
1762
1761
1762
1762
1767
1755
1750-1760
1750
1642-1649 (original); 1883 (model)
1755
1752
1760
1765-1775
2000-100 BCE
c.1750
1752
1752
1750-1774
1761
1761
1762
1761
1761
1750-1775
1775
1765
1705-1737
1761