This insulator was used on the end of an arcing horn at the bottom of a string of suspensions. I've seen and photographed one or two still in use in Wisconsin but have only recently come across a duplicate. These were shown in the April 1989 Crown Jewels. I'll have to check the dimensions of mine because I measured it to be 6.5" tall rather than the 7" height given in the CJ. Otherwise it is 7.5" wide as given in the CJ article. Blackish in color. Large, threaded pinhole. There is a base ding and some light scratching. I would still call it VNM. I'm asking $75 plus postage for this scarce piece.