File:Kohlemikrofon Alois Zettler.jpg
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English: Coal microphone made by Alois Zettler, probably 1920ies. Museum für Kommunikation, Frankfurt, Germany. Photo by Maximilian Schönherr with help from Lioba Nägele.
Deutsch: Kohlemikrofon von Alois Zettler, vermutlich 1920er Jahre. Museum für Kommunikation, Frankfurt. Foto von Maximilian Schönherr, unterstützt von der Referentin für Nachrichtentechnik im Museumsdepot Heusenstamm Lioba Nägele. |
| Date | |
| Source | Own work |
| Author | Maximilian Schönherr |
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Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 21:23, 7 January 2015 | | 2,000 × 1,333 (362 KB) | Maximilian Schönherr (talk | contribs) | {{Information |Description ={{en|1=Coal microphone made by Alois Zettler, probably 1920ies. Museum für Kommunikation, Frankfurt, Germany. Photo by Maximilian Schönherr with help from Lioba Nägele.}} {{de|1=Kohlemikrofon von Alois Zettler, vermutl... |
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