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Large ceramic or stoneware piece.
(lemmy.world)
Let us help you identify that mysterious object you’ve found.
Currently in CHALLENGE mode: If you've got something obscure knocking about, post a picture, and let's see how we do. Please prefix such posts with "CHALLENGE:" so we know we've got a fighting chance.
I'm starting to think it is part of an insulator. It's just so big to be one. It's almost double the size of the the vintage 1950s one above. Maybe one section of a huge high voltage assembly?