
Difference Engine No. 1
circa 1832
circa 1832
circa 1846
1847-1848
1846
1668; 1924
1835
1838
1830 (original); 1967 (model)
1844
1839 (original); circa 1988 (replica)
circa 1842
1840
1845
1840
1842
1837
1837
1842
circa 1840
1843
1841
1837
1839
1955; 1830
1842
1836
1833
1837
1839
1840-1845
1846
1848
1837
1837
1847
1834
1832
1834
1834
1845
1845
1831
1934
1837
1830
1840
1835
1831
1840
1846