
Difference Engine No. 1
circa 1832
circa 1832
1815-1825
1820
1821
1838
1819
1835
1831
1805
1830 (original); 1967 (model)
1839 (original); circa 1988 (replica)
1801-1840 (original); 1901 (model)
1775-1799 (original); 1900-1907 (model)
1829
1840
1813-1814
1837
1837
1837
1820
1822-1840
1803-1828
circa 1840
1839
1821-1831
1808
1842
1805
1842
1808
1809
1835
1843
1955; 1830
1807
1837
1826
1841
1838
1863-7
1820-1840
1829
1833
1810-1840
1810-1840
1831
1810-1830
1836
1839
1812