
Difference Engine No. 1
circa 1832
circa 1832
1838
1839 (original); circa 1988 (replica)
1834-1836
1837
1837
1842
circa 1840
1834
1832
1842
1842
1837
1840
1834
1834
1837
1840
1835
1837
1842
1838
1841
1839
1837
1839
1955; 1830
1934
1837
1835
1841
1893-4
1838
1863-7
2000-100 BCE
1833
1836
1838
1839
1842
1841
1839
1840
1930 (replica); 1834 (original)
1839
1990-96
1833
circa 1840
1832
1830 (original); 1967 (model)