
Marine Timekeeper known as 'H5' by John Harrison and Son 1770
1770
1770
1775
1801
1775-1785
1815-1825
1798
1775-1799 (original); 1900-1907 (model)
1788
1820
1791
1752
1805
1800
1780
1783-1800
1795
circa 1808
1785-1795
1770-1800
1771-1800
1785
1776-1780
1776-1780
1776-1780
2000-100 BCE
1813
1778
1756-1800
1812
1805-1815
1760-1790
1775-1799
1783
1785
1802
1796-1798
1782
1751-1800
1761-1820
1797-1804
1796-1797
1790-1819
1820
1785-1789
1790-1819
1812
1790-1819
1790-1819
1790-1819
1758-1769