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Swiss "Conto" Model C Calculating Machine, 19...
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"Tasma Mod. C" Adding Machine, c. 1930...
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3 Writing Adding Machines, c. 1925 onwards...
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4 Writing Adding Machines, c. 1925...
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5 Mechanical Dial Adding Machines...
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5 Mechanical Adding Machines...
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Bunzel-Delton No. 7 Calculating Machine, 1908...
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"Austria" Arithmometer, c. 1910...
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XxX ('X multiplied by X') Keyboard Calculatin...
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"Burkhardt Arithmometer", 1878...
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"Thomas' Arithmomètre", c. 1870...
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"Hines Patent Calculator" with 3 Wheels, 1905...
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Fuller's Time Telegraph and Palmer's Computin...
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4 Electric Calculators with Nixie Tube Displa...
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3 Rack-and-Pinion Adders...
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2 "Consul - The Educated Monkey" Calculators,...
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Loga Calculating Drum, c. 1930...
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"Bunzel-Delton No. 5", 1908...
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"Saxonia" Calculator, 1895...
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XxX", 1906...
