
Marine Timekeeper known as 'H5' by John Harrison and Son 1770
1770
1770
1829
1829
1815-1825
1781-1790
1777-1785
1831
1801-1830
1791
1795
1775
1830 (original); 1967 (model)
1821
1771-1830
1775
1794
1771-1830
1771-1830
1771-1830
1798
1797
1934
1805
1800
1780
1783-1800
1812
1830
1795
circa 1808
1785-1795
1770-1800
1771-1830
1835
1785
1826
1776-1780
1776-1780
1776-1780
1808
1832
1793-1803
1821-1831
1835
circa 1805
1807
1782-1793
1770
1785-1790
1784