
Babbage's Analytical Engine, 1834-1871. (Trial model)
1871
1871
1872
1853-1857
1870
1846
1872
1850
circa 1846
1851
1845-1855
1847-1848
1860
1850-1856
1850-1859
1845
1851
1850-1859
1853
1865
1867-1868
1849
1855
1846-1859
1854
1875
1853
1850
1852
1870
1866-1870
circa 1854
1850
circa 1854
1870-1875
1850-1860
1843
1855
1860
1849
circa 1868
1862
1850
circa 1871
circa 1860
circa 1861
1847
1845-1855
1865
1862
1875