
Difference Engine No. 1
circa 1832
circa 1832
circa 1846
1847-1848
1846
1829
1668; 1924
1829
1835
1825-1835
1849
1838
1830 (original); 1967 (model)
1821
1844
1839 (original); circa 1988 (replica)
circa 1842
1840
1845
1849
1840
1842
1850
1837
1837
1842
1822-1840
1850
1825
circa 1840
1843
1849
1841
1837
1839
1955; 1830
1826
1842
1849
1830-1850
1827-1850
1836
1821-1850
1833
1834-1844
1837
1820
1839
1840-1845
1840-1850
1822-1850