
Difference Engine No. 1
circa 1832
circa 1832
1838
1860
1858
1839 (original); circa 1988 (replica)
1846
1834-1836
1851
1850-1859
1853
1865
1867-1868
1849
1846-1859
1854
1853
1837
1837
1852
1834-1844
1837
1820
1822-1840
circa 1854
1850
circa 1854
circa 1840
1850-1860
1843
1860
1821-1831
1849
1955; 1830
1842
1805
1829-1851
1849
1840-1850
1830-1850
1822-1850
1846
1807
1860
1850-1859
1842
1862
1848
1858
1862
1850