Here is a U-105 in my collection. It is an old insulator, sort of a 'porcelain toll', if you will. So far, I have seen no information on who made it. If anybody knows, I would sure appreciate some help. I think it's cool lookin' ! Update: Robin Harrison, a well known collector from Seattle just told me that it is likely a Pittsburg. Which is a coincidence since I bought it from him at a swap years ago!