
Difference Engine No. 1
circa 1832
circa 1832
1838
1839 (original); circa 1988 (replica)
1834-1836
1837
1837
1842
circa 1840
circa 1800
1830-1840
1834
1832
1798
1842
1797
1825
1842
1837
1840
1826
1834
1834
1808
1808
1809
1835
1829
circa 1805
1807
1815
1815
1810-1817
1801-1838
1893-4
1802
1837
1863-7
1808
1800
1807
1821
1805
1800
1800
1800
1812
1800
1805-1815
1830
1820-1840