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Siemens & Halske Earthing Bridge Meter, c. 18...
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Quenched Spark Transmitter with Inductor...
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Austrian Telegraph by Leopolder & Sohn, Vienn...
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English Telegraph Demonstration Model, 1902...
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E. Morin Ink Writer Telegraph, c. 1918...
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Prussian Telegraph Receiver, c. 1875...
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Ink Writer Telegraph by Leopolder & Sohn, c. ...
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German Telegraph System by Siemens & Halske, ...
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Kenbak-I Digital Computer, 1971...
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Hagelin Cryptos CX-52 Cypher Machine, 1952 on...
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Ciphering Machine Enigma (K-Model) with addit...
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Transvertex HC-9 Cypher Machine, c. 1955...
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National Mod. 442X Cash Register, 1911...
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6 Calculating Machines...
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6 Calculating Machines...
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6 Calculating Machines...
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4 Desk Calculators...
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7 Calculating Machines...
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Collection of 16 Fast Adding Machines...
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5 Calculating Machines...
