
Difference Engine No. 1
circa 1832
circa 1832
1838
1835
1831
1830 (original); 1967 (model)
1839 (original); circa 1988 (replica)
1775-1799 (original); 1900-1907 (model)
1829
1837
1837
1837
1839
1835
1955; 1830
1837
1826
1838
1863-7
1829
1833
1831
1836
1839
1834
1829
1832
1831
1893-4
1934
1837
1830
1825
2000-100 BCE
1837
1837
1826
1838
1834
1834
1825-1835
1838
1832
1839
1826
1839
1839
1839
1990-96
1830
1830-1835