2 Free Photos of Mechanical Calculators In Mathematisch Physikalischer Salon (zwinger, Dresden)

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Mechanical calculator, Jakob Auch, Vayhingen, 1790 - Mathematisch-Physikalischer Salon, Dresden - DSC07942
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Mechanical calculator (ten places), Blaise Pascal, France, c. 1650 - Mathematisch-Physikalischer Salon, Dresden - DSC07976
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