
Difference Engine No. 1
circa 1832
circa 1832
1838
1839 (original); circa 1988 (replica)
1834-1836
1837
1837
1834
1832
1825
1837
1826
1834
1834
1829
1837
1830
1835
1837
1838
1839
1837
1831
1839
1955; 1830
1934
1837
1826
1825-1835
1835
1893-4
1838
1863-7
1829
2000-100 BCE
1833
1831
1836
1838
1826
1839
1839
1830
1826
1831
1830
1829
1930 (replica); 1834 (original)
1839
1830
1990-96