File:Haddenbrock24.jpg

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Haddenbrock24.jpg ‎(500 × 296 pixels, file size: 30 KB, MIME type: image/jpeg)

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Description
English: telegraph key from book "Kleine Telegraphenschule für Post- und Telegraphenbeamte" (1888/1907)
Source http://www.qsl.net/dk5ke/tasten.html
Author Adalbert Haddenbrock, Oberpostsekretär

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current12:56, 22 November 2010Thumbnail for version as of 12:56, 22 November 2010500 × 296 (30 KB)Allesmüller~commonswiki (talk | contribs){{Information |Description={{en|1=telegraph key from book "Kleine Telegraphenschule für Post- und Telegraphenbeamte" (1888/1907)}} |Source=http://www.qsl.net/dk5ke/tasten.html |Author=Adalbert Haddenbrock, Oberpostsekretär |Date= |Permission= |other_ver

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