It looks like an unembossed ESA T1 in a really good looking deep emerald green. It is a CD 154.3 with the smaller dome than the normal CD 154. There is a shallow chip on the lower ridge of the wire groove. It is located about 3/4" from the mold line. Other than the shallow chip, the insulator looks great. This is one of those Spanish insulators that probably saw service in Mexico. I've seen many embossed CD 154 ESA's in aqua, but this one being a CD 154.3, unembossed and very colorful should make it a nice addition to your collection. I'm asking $40 which includes shipping.