
Babbage's Analytical Engine, 1834-1871. (Trial model)
1871
1871
1870
1879
1870
1846
1858
1830 (original); 1967 (model)
1885
1875
1865-1866
1815-1825
circa 1861
1862
1801-1838
1889
1858
1860
1880
1869
1845-1855
1821
circa 1842
1858
1853-1857
1801-1830
1849
1822
1829
1847-1848
1829
1801
1888
1801-1830
before 1889
1870-1888
1886
1853
1865
1849
1846-1859
1854
1875
1884
1837
1877
1860
1821-1831
1842
1846
1884