
Difference Engine No. 1
circa 1832
circa 1832
1838
1839 (original); circa 1988 (replica)
1834-1836
1837
1837
circa 1840
1830-1840
1834
1832
1825
1837
1840
1826
1834
1834
1829
1815
1815
1810-1817
1837
1821
1812
1830
1812
1814
1840
1816
1810-1840
1810-1840
1835
1837
1821-1831
1838
1815-1825
1839
1837
1822-1840
1831
1820
1839
1955; 1830
1934
1837
1812
1826
1825-1835
1815
1835
1893-4