
Difference Engine No. 1
circa 1832
circa 1832
1838
1839 (original); circa 1988 (replica)
1846
1834-1836
1851
1853
1849
1854
1853
1837
1837
1852
1834-1844
1837
circa 1854
1850
circa 1854
circa 1840
1843
1849
1955; 1830
1842
1829-1851
1849
1840-1850
1830-1850
1846
1842
1848
1850
1835
1837
1847
1834
1829
1845-1855
1832
1840-1851
1845
1826
1831
1842
1856
1855
1856
1848-1852
1841
1893-4
1851