Here's a scarce ribbed disc insulator from Spain used to support wall bushings or cables through walls in substations and indoor powerhouse. Most likely an unembossed Esperanza SA product. The ribs increase the leakage distance and strengthen the weight capacity of the insulator. Measures 8 1/2 inches across. Outer ring is also unusual in that it is not flush but instead has a 3/4 inch extension. 1/2 pinky nail bruise and 3-4 micro tic marks are the only damage. Lot of cold mold straw lines.

First email gets this scarce ribbed disc insulator from Spain for only $100 plus shipping. Could be a new cd number! Thanks!