
Difference Engine No. 1
circa 1832
circa 1832
1953
1775
1879
1871
1956
1948-1953
1934
1899-1919
1858
1839 (original); circa 1988 (replica)
1770
1907
1854
1955-1965
1916-1996
1900
1701-1752
1735-1753
1862-1912
1625
1640
1690
1870-1880
1875
1850
1790-1819
1808
1917
1960
1901
1872
1807
1752
1630-1653
1660-1665
1603
1708
1663
1757
1992-1999
1761