Category:Optical telegraphy: Difference between revisions
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[[Image:Optical Telegraph Old Prussian Optical Telegraph Attribution.jpg|thumb|right|A replica of the controls on a Prussian Optical Telegraph - Image by Super Bass]] | |||
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Revision as of 16:41, 15 February 2012
Pages in category "Optical telegraphy"
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Media in category "Optical telegraphy"
This category contains only the following file.
- Optical Telegraph Old Prussian Optical Telegraph Attribution.jpg 1,468 × 2,570; 884 KB