
Difference Engine No. 1
circa 1832
circa 1832
circa 1846
1835
1846
1847-1848
1838
1830
1775-1799 (original); 1900-1907 (model)
1839 (original); circa 1988 (replica)
circa 1848
1829
1840
1837
1837
circa 1840
1842
1845
1842
1934
1830
1840
1837
1845
1840
1845
1834
1834
1835
1834
1832
1842
1846
1848
1847
1829
1837
1833
1842
1837
1839
1841
1834-1844
1837
1839
1843
1955; 1830
1837
1831
1841
1893-4