
Difference Engine No. 1
circa 1832
circa 1832
1835
1838
1825-1835
1775-1799 (original); 1900-1907 (model)
1839 (original); circa 1988 (replica)
1830
1829
1840
1837
1837
1837
circa 1840
1843
1955; 1830
1842
1842
1835
1837
1834
1829
1832
1826
1831
1842
1841
1893-4
1838
1934
1837
1863-7
1830
1829
1840
1825
2000-100 BCE
1833
1831
1836
1837
1840
1842
1837
1839
1826
1838
1834
1834
1841
1839