Don't miss out on this beautiful "Prism" embossed insulator. Exceptional condition for this CD number, often found with damage to the umbrella. I would consider this a near mint insulator, condition issues are as follows. Small flake on the base, roughness near the embossing, looks to be manufacturing defect, a few tiny dings on the dome and lastly a pinky-fingernail size bruise near the wire groove is unnoticeable. A bit of history on the "prism" trademark, which is the emblem for "Emerald Glass", indicates this example was produced for the C.S. Knowles company. This uncommon piece doesn't come up for sale often. More pictures available upon request. $700 plus shipping