I have been collecting tolls for 20 years, and I still pick up embossings I don't have, to add to my collection. I found this at an antique store while we were on vacation. I think it's an EIN 080 because the number is on the edge of the curve of the dome. If you go by the value in the price guide this is a common insulator, but I don't think I've ever seen this EIN before. I'm curious if other collectors find this to be a common Am Tel embossing.