
Difference Engine No. 1
circa 1832
circa 1832
1838
1839 (original); circa 1988 (replica)
1846
1834-1836
1837
1837
1849
1842
1850
circa 1840
1827-1850
1830-1840
1834
1832
1845
1842
1825
1842
1848
1850
1837
1840
1826
1845
1834
1834
1830-1850
1850
1845
1847
1829
1837
1821
1830
1840
1849
1816
1835
1849
1834-1844
1837
1821-1831
1842
1838
1841
1839
1840-1845
1837
1822-1840