Insulators Home > Insulator Styles > Glass > Threaded > CD 194.5
Pyrex
http://www.nia.org/timeline/1930.htm : "June 3, 1930: Chester Gordon and James Lowe with A.T.&T. Co patent for a two piece transposition with a more water-tight joint. This patent covers the rare Pyrex CD 194.5/195.5. (US Patent 1,760,983)"
Goes together with CD 195.5
Insulators Home > Insulator Styles > Glass > Threaded > CD 194.5
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