Insulators Home > Insulator Styles > Glass > Threaded > CD 186
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In ICON article at http://www.insulators.info/icon/articles/browns-ponies.htm , Bill Meier says "CD 186, 186.1 and 186.2 are experimental pieces and no one really knows how they were used."
Insulators Home > Insulator Styles > Glass > Threaded > CD 186.2
Contact: A.C. Walker