
Difference Engine No. 1
circa 1832
circa 1832
1838
1831
circa 1846
1839 (original); circa 1988 (replica)
1846
1705-1737
1847-1848
1830 (original); 1967 (model)
1990-96
1829
1837
1837
1834-1844
1837
1955; 1830
1842
1846
1842
1848
1835
1847
1834
1829
1832
1845
1842
1841
1893-4
1838
1844
1934
1837
1844
1835-1845
1863-7
1830
1829
1840
2000-100 BCE
1833
1835
1836
1837
1840
1842
1838
1845
1834
1834