
Difference Engine No. 1
circa 1832
circa 1832
1838
1860
1846
1858
1839 (original); circa 1988 (replica)
1834-1836
1851
1850-1859
1853
1854
1837
1837
1860
1849
1842
1860
1850
circa 1840
1850-1859
1834
1845-1855
1832
1845
1842
1856
1842
1848
1858
1850
1837
1840
1845
1834
1834
1850
1851
1845
1847
1840-1851
1859
1858
1858
1851
1857-1858
1857-1858
1837
1857-1858
1858-03-02
1840