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Ladies Telegraph Conversation Fan, 1796...
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Bavarian Wall Telephone by Heller, c. 1900...
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Mix & Genest OB 04 Wall Telephone, c. 1904...
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Bavarian Wall Telephone by Wetzer, c. 1900...
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L.M. Ericsson Model BC 2000 Telephone, c. 189...
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L.M. Ericsson Model BC 2050 Telephone, c. 189...
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L.M. Ericsson, Butterstamp Telephone with Whi...
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Very Early Siemens & Halske Butterstamp Telep...
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4 Bell-Type Telephone Handsets, 1877 onwards...
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4 Bell-Type Telephone Handsets, 1877 onwards...
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Very Early Siemens & Halske Butterstamp Telep...
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The Williams Cheque Punch, c. 1895...
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The Edison Mimeograph Model 61, c. 1900...
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German Cash Register by Friedrich Krupp, c. 1...
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National Cash Register Model 452-E, c. 1914...
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IBM Computer Instructional Kit, 1986...
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Swedish Arithmometer by G. F. Sörensen, c. 18...
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2 Logarithmic Calculating Drums...
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Svecia Spoked-Wheel Calculator, 1901 onwards...
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Saxonia Calculator, c. 1905...
