'Bell-crank' engine, c. 1799
1795-1805 (original)
1795-1805 (original)
1968-1971
1898
1903
1862
1785
1794
1772 (original); 1919 (model)
1801-1840 (original); 1901 (model)
1819
1775-1799 (original); 1900-1907 (model)
1866
1788
1815
1892
1791
1898
1812-1814
1777
1797
1891
1804
1801-1830
1808
1884-1887
1820
1883-1891
1903