Encyclopedia > 1870

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Centuries: 18th century - 19th century - 20th century

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Years: 1865 1866 1867 1868 1869 - 1870 - 1871 1872 1873 1874 1875


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Bartolomeo Cristofori

... features of the modern device including the fast hammer action, the escapement and check, excepting only the metal frame. The lack of the metal frame meant that the ...