
Difference Engine No. 1
circa 1832
circa 1832
1838
1839 (original); circa 1988 (replica)
1834-1836
1837
1837
1837
circa 1840
1955; 1830
1835
1837
1834
1832
1893-4
1838
1934
1837
1863-7
1840
2000-100 BCE
1833
1835
1836
1837
1840
1838
1834
1834
1839
1839
1837
1838
1837-1840
1832
1839
1772 (original); 1919 (model)
1839
1990-96
1801-1840 (original); 1901 (model)
1775-1799 (original); 1900-1907 (model)
1833
1705-1737
1837
1835
1835
1839-1840
1838
1835-1840
1870-1877
1840