
Babbage's Analytical Engine, 1834-1871. (Trial model)
1871
1871
1775
1872
1878-1879
circa 1871
1870
1801
1770
1801-1830
1751-1800
1780-1850
1862
circa 1832
1879
1771-1830
1872
1850-1860
circa 1846
1835
1850-1870
1850
1860
1866-1870
1845-1855
1788
1879
1846
1853-1857
1870
1858
1847-1848
1865-1877
1838
1871
1850-1870
1771-1800
1875
1776
1862
1840-1851
1801-1838
1850-1870
1815-1825
1825-1835
1853-1857
1868
1830
1821
1874
1862