
Babbage's Analytical Engine, 1834-1871. (Trial model)
1871
1871
1860
1858
1839 (original); circa 1988 (replica)
1870
1851
1850-1859
1853
1854
1860
1860
1850
1850-1859
1856
1861
1861
1858
1850
circa 1868
1850
circa 1861
1851
1865
1867
1867
1859
1858
1858
1865-1866
1865
1851
1866
1857-1858
1857-1858
1857-1858
1858-03-02
1857-1870
1855
1862
1862
circa 1871
1865
1867-1868
1853
1870
1850-1856
1857
1871
1850-1860
circa 1860