
Difference Engine No. 1
circa 1832
circa 1832
1838
1831
circa 1846
1840-1851
1839 (original); circa 1988 (replica)
1846
1705-1737
1847-1848
1830 (original); 1967 (model)
1990-96
1829
1851
1853
1849
1854
1853
1837
1837
1852
1834-1844
1837
1821-1831
1849
1955; 1830
1842
1830-1850
1846
1842
1848
1850
1835
1847
1834
1829
1845-1855
1832
1845
1842
1856
1855
1856
1848-1852
1841
1893-4
1851
1838
1844
1934
1837