
Difference Engine No. 1
circa 1832
circa 1832
1801-1830
1801
1847-1848
1815-1825
1819
1800-1830
circa 1846
1851
1829
1852
1796-1798
1848
1835
1838
1801-1840 (original); 1901 (model)
1805
1839 (original); circa 1988 (replica)
1846
1849
circa 1848
1844
1845-1855
1821
1806
1845
1851
1853
1793-1803
1849
1855
1854
1840
1842
1853
1850
1837
1794
1837
1834-1844
1837
1820
1822-1840
circa 1854
1850
circa 1854
1803-1828
circa 1840
1839
1843