
Difference Engine No. 1
circa 1832
circa 1832
1835
1838
1815-1825
1825-1835
1830
1821
1775-1799 (original); 1900-1907 (model)
1839 (original); circa 1988 (replica)
1820
1829
1840
1837
1837
1822-1840
circa 1840
1934
1812
1830
1840
1825
1837
1840
1826
1834
1834
1809
1835
1821-1831
1834
1832
1829
1810-1817
1837
1814
1833
1837
1839
circa 1810
1812
1837
1820
1839
1955; 1830
1837
1826
1831
1815
1815
1893-4