
Difference Engine No. 1
circa 1832
circa 1832
1850-1860
circa 1846
1850
1860
1835
1858
1846
1853-1857
1847-1848
1845-1855
1838
1840-1851
1825-1835
1775-1799 (original); 1900-1907 (model)
1839 (original); circa 1988 (replica)
before 1857
1853-1857
circa 1848
1850
1851
1830
1830-1850
1829
1840
1860
1850-1859
1851
1850-1859
1853
1849
1846-1859
1854
1853
1837
1837
1852
1834-1844
1837
circa 1854
1850
circa 1854
circa 1840
1850-1860
1843
1860
1849
1955; 1830
1842
1829-1851