
Marine Timekeeper known as 'H5' by John Harrison and Son 1770
1770
1770
1791
1775
1780
1775
1801
1794
1762
1798
1797
1800
1780
1783-1800
1795
1785-1795
1770-1800
1771-1800
1785
1776-1780
1776-1780
1776-1780
2000-100 BCE
1778
1770-1800
1760-1790
1775-1799
1783
1785
1793-1803
1782-1793
1770
1785-1790
1784
1784
1762
1762
1769
1761
1762
1762
1761
1762
1762
1762
1762
1762
1791
1786
1800
1776