
Difference Engine No. 1
circa 1832
circa 1832
1820
circa 1846
1821
1847-1848
1838
1851
1835
1831
1801-1840 (original); 1901 (model)
1775-1799 (original); 1900-1907 (model)
1855
1839 (original); circa 1988 (replica)
1846
1844
1830 (original); 1967 (model)
1845-1855
1829
1840
1853
1849
1854
1853
1837
1837
1852
1834-1844
1837
1820
1822-1840
circa 1854
1850
circa 1854
circa 1840
1839
1843
1821-1831
1849
1955; 1830
1842
1829-1851
1849
1840-1850
1830-1850
1827-1850
1822-1850
1846
1842
1848
1850