Photo of a '<a href="https://en.wikipedia.org/wiki/Pascaline" class="extiw" title="wikipedia:Pascaline">Pascaline</a>', the mechanical calculator invented and manufactured by French scientist <a href="https://en.wikipedia.org/wiki/Blaise_Pascal" class="extiw" title="wikipedia:Blaise Pascal">Blaise Pascal</a> between 1642 and 1652.
J. A. V. Turck
1921
Downloaded 2008-1-9 from <a rel="nofollow" class="external text" href="https://books.google.com/books?id=ir00AAAAMAAJ&amp;pg=PA10">J. A. V. Turck (1921) <i>Origin of Modern Calculating Machines</i>, Western Society of Engineers, Chicago, USA, p.10, fig.1</a> from Google Books