For sale is a CD 121.4[020] A.U. insulator in a great light green color. The glass is all there except it is acid stained in the front of the insulator, the type of staining that happens when it lies on the ground for many years. It looks like a good polishing would remove much of the surface problem. There are also a few scratches on the insulator. The rear is in very good shape. Please email with any questions or any requests for information. Thanks I am asking $30 plus shipping.