Difference Engine No. 1
circa 1832
circa 1832
1610; 1923
1815-1825
1834-1836
1844
1829
1842
1821
1820
1829
1839 (original); circa 1988 (replica)
1829
1775-1799 (original); 1900-1907 (model)
1840
1831
1840
1831
1990-96
1838
1833
1838
1934
1772 (original); 1919 (model)
1705-1737
1801-1840 (original); 1901 (model)
1819
1844
1838
1820
1828
1830
1835
1837
1821-1831
1825-1835
1840-1845
1815
1822
2000-100 BCE
1843
1832
4000-2001 BCE
1825
circa 1840
1839
1845
1830
1837
1826
circa 1840