For sale is a CD 133.1 [020] except it does have a period that is not list in my guide. The rear embossing is 3 ./ A . The insulator is full of bubbles but does have a chip up front out of the wire ridge about 1/2 inch in size. There is also a small fracture on the right side coming about 1/4 inch up from the base. If you have any questions please email. It is a neat piece . I would like to get $25 plus postage from the insulator. Thanks