
Marine Timekeeper known as 'H5' by John Harrison and Son 1770
1770
1770
1841
1844
1837
1894-1904
1900-1910
1790
1801-1900
1950-1951
1724
1630
1901-2000
1666-1680
1925-1930
1856
1944
1890-1900
2005
c.1825
1918
1876
1862
1801-1900
1880-1920
1886-1866
1915-1925
1880-1910
1908
1920-1950
2020
1801-1900
1890-1925
1831-1870
1750-1850
1851-1900
1890-1930
1700-1751
1752
1981
1701-1900
1801-1900