Up for your viewing is a CD 133.1 in an off clear with a light purple tint. Embossed Patent Dec.19, 1871. An insulator not usually offered for sale. Condition is very good with a very small chip on the lower wire ridge at the left mold line and a 1/8" scratch to the right of the embossing. Displays very nicely and priced to move at $55.00 plus shipping. Thank you for looking!