Trevithick's High Pressure Steam Engine and Boiler excluding flywheel
1805-1806
1805-1806
1884
1805-1806
1811-1826
1917
1940
1777
1955-1957
circa 1956
1955-1965
1903
1959
1919
1908
1946-1960
1935
1905-1910
1909
1953
1959-1968
1948-1953
1946
1947-1951
1892
1891