Vintage telephone exchange.
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Previously:
https://www.homemadetools.net/forum/...090#post187756
https://www.homemadetools.net/forum/...541#post162562
https://www.homemadetools.net/forum/...971#post187296
https://www.homemadetools.net/forum/...320#post173101
https://www.homemadetools.net/forum/...435#post189090
