
Babbage's Analytical Engine, 1834-1871. (Trial model)
1871
1871
1872
circa 1871
1870
1862
circa 1832
1872
1850-1860
circa 1846
1850-1870
1850
1860
1835
1866-1870
1858
1870
1846
1853-1857
1847-1848
1845-1855
1838
1871
1862
1840-1851
1850-1870
1850-1870
1815-1825
1825-1835
1775-1799 (original); 1900-1907 (model)
1871
1839 (original); circa 1988 (replica)
1862
before 1857
1868
1853-1857
circa 1848
1850
1873
1851
1830
1870
1830-1850
1820
1821
1829
1840
1831-1870
1860
1850-1859
1851