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"Palmer's Pocket Scale", 1844...
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American Disc Adder, c. 1870–90...
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Web Adder and Golden Gem...
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2 Small Counters...
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Burroughs Adding Machine Company, Detroit, Mi...
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6 Mechanical Calculators...
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6 Mechanical Calculators...
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2 Comptometers...
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3 American Adding Machines...
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4 Electric Calculating Machines...
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4 Electric Calculating Machines, c. 1940–60...
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3 Mechanical Calculating Machines...
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5 Mechanical Calculators...
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Mercedes-Euklid Electrical Calculating Machin...
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Adix Mod. 2, 1903...
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6 Spoke-Wheel Calculating Machines...
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TIM Mod. 1 (Unitas), 1907...
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2 Comptometers...
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Curta Type I Calculator, 1964...
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"The Millionaire" Calculating Machine, 1911...
