here is a pretty fair looking CD 138.2 base embossed THE STANDARD GLASS INSULATOR CO. BOSTON MASS. The embossing is in perfect condition. The color is a light blue-aqua with lots of tiny bubbles. There is a 3/4"x3/4" chip on the upper ridge of the wire groove. Other than that one chip the insulator is in beautiful condition. $60 plus actual shipping cost.