
Babbage's Analytical Engine, 1834-1871. (Trial model)
1871
1871
1903
1879
1895-1904
1879-1896
circa 1861
1862
1898
1877-1897
1885
1875
1884
1897-1898
1952-3
1872
circa 1900
1889
1884-1900
1830 (original); 1967 (model)
1869
1870
1880-1900
1870-1888
1872
1895
1896
1900
1886
circa 1885
1901
1860
1895
About 1890
1887-1903
1875-1890
1861
1861
1896
1872-1880
1934
1896
1879
1870-1890
after 1903
1886
1882
1904
1888
circa 1868
1890