File:Telephone switchboard cross-switching (Rankin Kennedy, Electrical Installations, Vol V, 1903).jpg

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current14:54, 29 June 2010Thumbnail for version as of 14:54, 29 June 2010553 × 712 (45 KB)Andy Dingley{{Scans from 'Rankin Kennedy, Electrical Installations', 1903 |volume=V |page= |figure= |title= |description= }} Category:Early telephone instruments

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