Found this last summer and really don't have a clue what it is. Has a small bit of extra glass where the seam burst in the lower left. Has absolutely no embossing. It looks similar to pictures of Grand Canyon style insulators, but it was found in Wyoming. Any help is appreciated.
The general opinion leaned in the direction of this being a Grand Canyon Style, but there are still some doubts. Till a real guru can handle this personally then I can't quite be sure.