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Early French Breguet Dial Telegraph System, c...
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French "Système Ader" Wall Telephone, c. 1880...
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2 German Telephones...
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3 Switchboards and 2 Bells...
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French Desk Telephone by A. Burgunder, c. 191...
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Telephones and Equipment...
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8 German Telephones...
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Collection of German Telephones...
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System 22 Electromechanical Telephone Exchang...
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Very Early Siemens & Halske Butterstamp Telep...
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German Telephone Switchboard, 1928...
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Group of Field Telephones...
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Commodore PET 2001 ("Blue PET"), 1977...
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2 Logarithmic Calculating Drums...
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Walther Diwa 32 Calculating Machine, 1970-72...
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Curta Type I Calculator, 1963...
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XxX ('X multiplied by X') Calculating Machine...
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Collection of Adding Machines, 1920-60...
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Arithmometer "Tim", 1909...
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Finnish Disc Adder by Hedberg, 1924...
