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I am trying to identify a mystery wall receptacle that I have in my house (built in the 60s, USA). I have one in the living room next to a fireplace, another in a bedroom. It looks somewhat like the C8 socket, but is more rectangular and rough-looking.

Does anybody know what this is?

EDIT: added opened picture

Mystery wall connector

Opened plate

Daniel S.
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1 Answers1

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Thanks for providing the "opened" picture, which clearly reveals that this is 300 ohm TV (and/or FM radio) antenna twinlead.

Not quite as obsolete as a buggywhip, but pretty close.

Ecnerwal
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