
Babbage's Analytical Engine, 1834-1871. (Trial model)
1871
1871
1905
1870
1879
1870
1903
1952-3
1895-1904
1830 (original); 1967 (model)
1885
circa 1861
1862
1895-1905
1865-1866
1860
circa 1897
1898
1902
1875
1898
1899
1877-1897
1889
1880
1869
circa 1900
1884-1900
1879-1896
1888
1870-1888
1880-1900
before 1889
1901
1860
1895
1870-1880
About 1890
1887-1903
1861
1861
1896
1896
1879
1870-1890
after 1903
1886
1904
circa 1885
circa 1905
1892-1902