This insulator is a CD 321 embossed on the front; Registered Trade Mark (Prism). It is a light blue color. The insulator is in nice condition but has a 3/8" neck bruise in the front, a 3/8" flake on the umbrella edge and some fine flaking to the sharp edge of the umbrella. A nice looking power piece. Priced at; $80.00 plus shipping.