'Bell-crank' engine, c. 1799
1795-1805 (original)
1795-1805 (original)
1720
1884
1805-1806
1891
1777 (original); 1894 (model)
1938
1887-1893
1848-1850
1867-1900
1924-1937
1930 (original); 1984 (model)
1884
1902
1888
1887
circa 1916
-1920
1698-1744
1902
1884
1920
1870
1855
1840
1884-1887
1900
1730-1740
1901