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8 Calculating Machines...
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Collection of 41 Mechanical Adders...
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4 Calculating Machines...
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Brunsviga Mod. 14 Twin Calculator, 1958...
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7 Calculating Machines...
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"Burkhardt Arithmometer", 1878...
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4 Calculators...
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4 Calculators...
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6 Spokewheel Adding Machines...
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"Antares" Cutaway Model...
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Brunsviga 13 Z Twin Calculator, 1932...
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Comptometer, c. 1935...
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French Calculating Drum ...
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The Marbel Blood-Cell Calculator, 1922...
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5 Calculating Machines...
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Collection of 16 Fast Adding Machines...
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7 Calculating Machines...
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4 Desk Calculators...
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6 Calculating Machines...
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6 Calculating Machines...
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6 Calculating Machines...