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15 American Cardboard Calculating Tools...
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Alpina Calculator, 1961...
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Web Adder and Golden Gem...
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SCM Cogito 240-SR Electronic Desktop Calculat...
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Sharp Compet 21 Electronic Desktop Calculator...
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Remington Rand EDC-3A Desktop Calculator, 196...
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4 Electric Calculating Machines with Printers...
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4 Electric Calculators with Nixie Tube Displa...
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Saxonia Calculator, 1895...
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Rema Calculator and Dactyle Demonstration Mod...
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Tate's Improved Arithmometer, c. 1905...
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The Meilicke Calculator, 1906 onwards...
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4 American Adding Machines...
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Ellis Adding Typewriter, 1910 onwards...
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"The Millionaire" Calculating Machine, 1912...
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3 American Adding Machines...
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Edwin Thacher's Cylindrical Slide Rule Calcul...
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4 Electric Calculating Machines...
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6 Toothed Wheel Adders...
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Chinese Circular Abacus "Suan Pan", c. 1936...
