Lot #57 HG CO Petticoat Insulator Beehive with 7 Bubbles - I HUGE There are 7 bubbles in the skirt of the insulator, giving this HG CO Petticoat amazing character. The big bubble is 1 and 3/8 inch by 5/8 inch. There is no mold letter and no dome letter. The only damage is a small chip to the wire groove on the Petticoat side. This insulator was found along the UPRR in Wyoming about two years ago east of Rawlings. $125 + shipping.