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14) The four-species calculating machine with a switching latch by Heyde and Büttner from the year 1883
12) Prototype of the four-species calculating machine with a switching latch mechanism by Curt Dietzschold from the year 1876
11) Christel Hamann’s “Gauss-Mercedes” calculating machine with the unique stepped disc from the year 1909
10) Jacob Auch's adding machine
09) The "Hamann Manus" calculating machine
08) Adding machine by Philipp Matthäus Hahn
07) The patent model of Thomas de Colmar’s Arithmomètre from the year 1820
06) Multiplication Instrument by Samuel Morland
05) Johann Christoph Schuster's calculating machine
04) Blaise Pascal's calculating machine
03) The mechanical calculator for all four arithmetic operations by Axel Jacob Petersson
02) The mechanical calculator for all four arithmetic operations by Johann Jakob Sauter
01) The first mechanical calculator for all four arithmetic operations by Gottfried Wilhelm Leibniz
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