
Marine Timekeeper known as 'H5' by John Harrison and Son 1770
1770
1770
1701-1800
1632-1640
1601-1850
1681
1830 (original); 1967 (model)
1846
1775
1858
1607-1653
1791
1690
1630-1642
1780-1850
1815-1825
1801-1838
1858
1771-1830
1700-1850
1795-1805
1744-1774
1845-1855
1821
circa 1842
1858
1853-1857
1801-1830
1822
1849
1780
1829
1675-1679
1847-1848
1775
1829
1801
1801-1830
1853
1793-1803
1849
1854
1837
1794
1821-1831
1842
1846
1842
1847
1845-1855
1832