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