
Difference Engine No. 1
circa 1832
circa 1832
1847-1848
1815-1825
circa 1846
1819
1829
1835
1848
1838
1839 (original); circa 1988 (replica)
circa 1848
1844
1821
1801-1840 (original); 1901 (model)
1846
1845
1840
1842
1837
1837
1837
1820
1822-1840
circa 1840
1839
1821-1831
1837
1840-1845
1839
1826
1846
1837
1838
1833
1835
1835-1845
1829
1847
1834
1829
1832
1834
1834
1845
1845
1826
1831
1815
1815
1842