Another nice piece out of New England. This is a CD 138.2 base embossed THE STANDARD GLASS INSULATOR CO. BOSTON MASS. There is a small open bubble that runs between the T and A in STANDARD. These open bubbles are often found on the base of many Standard insulators. There is some shallow chipping at the base of the threads. The whole exterior of the insulator is in super condition . The color is a blue-aqua. The price is $90 delivered in the U.S. or Canada.