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6 Mechanical Calculators...
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"Bunzel-Delton No. 5" Calculator, c. 1908...
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"Curta Type II" (Grey), 1959...
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4 Watch-form Calculators...
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7 Interesting Office Antiques...
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2 Watch-form Calculators...
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3 Calculating Watches and 1 Circular Slide Ru...
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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...
