
Marine Timekeeper known as 'H5' by John Harrison and Son 1770
1770
1770
1701-1800
1632-1640
1601-1850
1681
1501-1600
1858
1690
1607-1653
1791
1775
1830 (original); 1967 (model)
1846
1780-1850
1815-1825
1771-1830
1700-1850
1630-1642
1801-1838
1860
1858
1795-1805
1744-1774
1845-1855
1554
1801-1830
1501-1800
1829
1822
1849
1675-1679
1858
1853-1857
1780
1847-1848
1821
1775
circa 1842
1550-1800
1829
1501-1700
1801
1501-1700
1801-1830
1854
1837
1794
1860
1842
1842