
Difference Engine No. 1
circa 1832
circa 1832
1820
1821
1838
circa 1846
1847-1848
1819
1851
1835
1831
1846
1855
1830 (original); 1967 (model)
1845-1855
1839 (original); circa 1988 (replica)
1844
1801-1840 (original); 1901 (model)
1775-1799 (original); 1900-1907 (model)
1829
1840
1853
1849
1854
1853
1837
1837
1834-1844
1837
1820
1822-1840
circa 1854
1850
circa 1854
circa 1840
1839
1821-1831
1849
1842
1840-1850
1827-1850
1822-1850
1846
1842
1848
1850
1835
1852
1843
1955; 1830
1829-1851