section cb1 manual telephone exchange switchboard displayed science museum london |
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| navigate by keyword : antique attraction board britain british cable call cb1 closeup collection communication connecting cord device dial display displayed education england english equipment europe exchange exhibition fashion fashioned focus historic history kingdom landmark line london manual museum network old operator panel pbx phone plug retro science scientific section selective switch switchboard system telecommunication telephone tourism tourist united vintage wire |
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| Section of a CB1 manual telephone exchange switchboard displayed at Science Museum, London, England |
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