
Difference Engine No. 1
circa 1832
circa 1832
1872
1879
1871
1838
1860
1858
1839 (original); circa 1988 (replica)
1846
1870
1860-1880
1834-1836
1851
1879
1850-1859
1853
1854
1837
1837
1877
1860
1849
1842
1860
circa 1880
1850
1878
circa 1840
1850-1859
1863-1865
1827-1850
1830-1840
1834
1845-1855
1832
1845
1842
1856
1861
1861
1825
1831-1870
1870-1880
1842
1848
1858
1875
1850
1837
1840