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Tate's Patent Arithmometer, c. 1910...
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Curta Type I Calculator, 1955...
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"Certa" Adding Machine...
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Brass Stepped-Drum Calculating Machine ...
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4 Mechanical Calculating Machines...
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Edwin Thacher's Cylindrical Slide Rule Calcul...
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"Millionär" Calculating Machine, 1913...
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4 Electric Calculating Machines...
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Curta "Type I" Calculator, 1970...
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Curta Type II Calculator (Grey), 1970...
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"Millionär" Calculator, c. 1905...
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6 Mechanical Calculating and Adding Machines,...
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"Tim Unitas", Calculating Machine, 1912...
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4 Calculating Machines, c. 1930...
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Olivetti Logos 55 Electronic Desktop Calculat...
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Alpina Universal Calculator, 1961...
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2 Early Calculating Machines, c. 1930...
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Very Interesting Group of Early Adding Machin...
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4 Mechanical Adding Machines...
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8 Brunsviga Calculating Machines...
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Olivetti Logos 70 Desktop Calculator, 1973...
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2 Calculator Demonstration Models, c. 1950...
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6 Spoked-Wheel Calculating Machines...
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Toshiba BC-1211S Electronic Desktop Calculato...
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Olivetti Logos 245 Electronic Desktop Calcula...
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2 GDR Calculating Machines...
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Olivetti Underwood 280 Electronic Desktop Cal...
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6 Calculating Machines...
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Bunzel Arithmometer, c. 1910...
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6 Calculating Machines...
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7 Calculating Machines...
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"XxX" ('X multiplied by X') Calculating Machi...
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4 Mechanical Calculating Machines...
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Curta Type I Calculator, 1963...
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2 Mechanical Calculating Machines...
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Olivetti Logos 58 Electronic Calculator, 1973...
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3 Spoked-Wheel Calculating Machines and 1 Typ...
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Calculators, Calculating Tools and Demonstrat...
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2 Spoked-Wheel Calculating Machines...
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4 Calculating Machines...
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"Curta Type II" (Grey), 1948...
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"Madas Model IX Te Malaga" Calculating Machin...
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"Curta Type II" (Grey), 1948...
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4 Electric Calculating Machines...
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Olivetti Divisumma 26 Electromechanical Deskt...
