
Babbage's Analytical Engine, 1834-1871. (Trial model)
1871
1871
1872
1853-1857
1870
1872
1851
1860
1851
1853
1865
1867-1868
1855
1854
1875
1853
1852
1877
1870
1866-1870
circa 1854
1878
circa 1854
1870-1875
1860
circa 1868
1862
circa 1871
circa 1860
circa 1861
1865
1862
1875
1867
1867
1859
1863-1865
1851
1955; 1830
1857
1871
1855-1870
circa 1861
1856
1861
1861
1876
1878
1858
1858
1855