Here is an unusual early 3-part Pinco insulator that have only been found in the Northwest. I know of only 4 of these in existence, I am selling this one as I have a mint one now. I found this one on the Nooksack line on the north slopes of Mt. Baker in WA. This is marked in big bold incuse on the crown "PINCO" and on the other side of the crown "LOT P-13". The few of these found appear to have been replacement insulators used by Puget Power around 1920. A second photo will follow this one, $25 + shipping cheapest way.