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"Curta Type II" (Grey), 1948...
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"Thomas' Arithmomètre", c. 1875...
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6 Small Calculating Machines...
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5 Mechanical Adding Machines...
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4 Spoked-Wheel Calculating Machines...
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4 Printing Adding Machines, c. 1925...
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4 Writing Adding Machines, c. 1925...
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4 Spoked-Wheel Calculating Machines...
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7 Mechanical Adding Machines...
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6 Spoked-Wheel Calculating Machines...
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2 Monroe Adding Machines, 1930s...
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2 Calculating Machines...
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"Saxonia 5" Calculating Machine, 1919 onwards...
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4 Mechanical Adding Machines, 1920s...
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4 Brunsviga Spoked-Wheel Calculating Machines...
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Burroughs Class 1, Style 6 Adding Machine, c....
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4 Mechanical Calculating Machines, c. 1930/40...
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4 Disc Adders...
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4 Spoked-Wheel Calculating Machines...
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5 Mechanical Calculating Devices...
