
Marine Timekeeper known as 'H5' by John Harrison and Son 1770
1770
1770
1666-1680
1944
1915-1917
1950-1951
1844
1837
1894-1904
1900-1910
1790
1801-1900
1841
2005
1951
1925-1930
1856
1630
1724
1890-1900
1901-2000
1870-1910
1920-1930
1870-1920
c.1825
1862-1863
1750-1800
1871-1900
1750-1900
1801-1900
1856-1900
1801-1900
1801-1870
1915-1925
1880-1920
1701-1900
1886-1866
1870-1910
1920-1950
1920-1950
1871-1896
1930-1950
1880-1920
1930-1950
1870-1901
1880-1930
1820-1866
1920-1950
2014