
Marine Timekeeper known as 'H5' by John Harrison and Son 1770
1770
1770
1802
1851
1808
1800
1630
1807
1650
1821
1796
1800
1800
1794
1780
1783-1800
2010
1767
1740-1760
1745
1805-1815
1807
1879
1792
1702
1739
1710
1999
circa 1808
1790
circa 1715
circa 1710
1795
1765-1775
1790
1785-1795
1700-1710
1907
1790
1785-1795
1730
1625
1989-2003
1630
1788
1650
1791
1820
1908
1784