
Marine Timekeeper known as 'H5' by John Harrison and Son 1770
1770
1770
1870
1870
1858
1791
1775
1830 (original); 1967 (model)
1846
1780-1850
1815-1825
circa 1861
1862
1771-1830
1865-1866
1801-1838
1860
1858
1795-1805
1845-1855
1869
1829
1822
1849
1858
1853-1857
1780
1801-1830
1847-1848
1821
1775
circa 1842
1829
1801
1801-1830
1854
1837
1794
1860
1842
1842
1845-1855
1832
1845
1752
1762
1798
1755
1842
1856
1861