
Difference Engine No. 1
circa 1832
circa 1832
circa 1846
1846
1829
1668; 1924
1829
1835
1825-1835
1838
1830 (original); 1967 (model)
1821
1844
1839 (original); circa 1988 (replica)
circa 1842
1840
1845
1840
1842
1837
1837
1810-1840
1842
1810-1840
1822-1840
circa 1840
1843
1841
1837
1839
1955; 1830
1826
1808
1842
1836
1833
1834-1844
1837
1820
1839
1840-1845
1846
1837
1808
1809
1815-1825
1837
1847
1834
1832
1834