
Marine Timekeeper known as 'H5' by John Harrison and Son 1770
1770
1770
1769 - 1849
1748-1763
1725-1755
2000-100 BCE
1701-1730
1764
1701-1750
1742
1701-1750
1740-1753
1720-1770
1758-1769
1758-1769
1760-1770
1758-1769
1750-1770
1750-1766
circa 1750
1700-1720
circa 1711
1755
1745-1755
1752
1762
1750
1752
1770
1701-1752
1755
1750-1760
1720
1701-1752
1700-1752
1755
1708
1735-1752
1729-1753
1735-1753
1762
1762
1769
1745-1755
1745-1755
1735-1754.
1757
1752
1761
1762
1762