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Title: Siemens alphabetical telegraph, 1875 [Go to resource]
Description: Siemens alphabetical telegraph, 1875 License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Temporal: 1875 Source: Science Museum Identifier: 1970-73 Go to resource More Like this...-
Siemens-Hell-Schreiber stop-start facsimile…Stop-start facsimile telegraph, Siemens-Hell-Schreiber GL,…
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