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Triumph Adding Machine, 1910...
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"The Centigraph" Adding Machine, 1891...
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Tate's Patent Arithmometer, c. 1910...
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F.S. Baldwin's Arithmometer, 1874...
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"Certa" Adding Machine...
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Adix Mod. 2, 1903...
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Replica of the First Mechanical Calculating M...
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"The Spalding Adding Machine", 1884...
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2 German Stepped-Drum Calculators...
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6 American Counters, c. 1900-20...
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"Millionär" Calculating Machine, 1914...
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Morse Pre-Vis Adding Machine, 1915 onwards...
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"Commonwealth" Adding Machine, 1915...
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"Monopol" Calculating Machine, 1902 onwards...
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"Peerless Baby" Calculating Machine, 1910...
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3 Adding Machines...
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3 Calculating Devices...
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4 British Calculating and Measuring Instrumen...
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3 American Disc Adders...
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3 American Disc Adders...
