Unembossed Cable Top with Dark Glaze in Wire Grooves Only

By Andy Wadysz; posted October 8, 2017

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Anyone familiar with these? I have never seen one. The dark glze looks to have been sprayed on prior to firing. Please let me know if you have any info on these. Thanks to Chris Hedges for answering! He suggests this is a type of underglazed radio treatment and may be a Westinghouse, although I can find no W on it.