File:Instructions for switchboard monocord type circa 1917.pdf
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Instructions_for_switchboard_monocord_type_circa_1917.pdf (file size: 4.45 MB, MIME type: application/pdf)
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| Date/Time | Dimensions | User | Comment | |
|---|---|---|---|---|
| current | 17:37, 24 April 2014 | (4.45 MB) | RadioNerds (talk | contribs) |
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