2 7/8" X 3 7/8" (72mm X 98mm) (front skirt) E'LECTRO VERRE (rear skirt)            22                  Photo courtesy Bud Johnson

Original CD assignment from Glass Insulators From Outside North America published in 1993 by Marilyn Albers & N.R. Woodward. Note that CD 572.2 is so close to CD 572 that they have been merged.