
Marine Timekeeper known as 'H5' by John Harrison and Son 1770
1770
1770
1791
1775
1795-1805
1780
1775
1801
1794
1762
1798
1797
1805
1800
1780
1783-1800
1795
circa 1808
1785-1795
1770-1800
1771-1800
1785
1776-1780
1776-1780
1776-1780
2000-100 BCE
1813
1778
1808
1770-1800
1812
1805-1815
1760-1790
1775-1799
1783
1785
1793-1803
circa 1805
1807
1782-1793
1770
1785-1790
1784
1815
1784
1762
1762
1769
1765-1806
1815
1761