
Difference Engine No. 1
circa 1832
circa 1832
1838
1839 (original); circa 1988 (replica)
1834-1836
1837
1837
circa 1840
1830-1840
1834
1832
1825
1837
1840
1826
1834
1834
1829
1837
1821
1830
1840
1835
1837
1821-1831
1838
1839
1837
1822-1840
1831
1820
1839
1955; 1830
1934
1837
1826
1825-1835
1835
1893-4
1838
1863-7
1820-1840
1829
2000-100 BCE
1833
1820-1830
1831
1836
1838
1826
1839