I picked this one up at an auction with a box lot of insulators. It has obviously been radiated. One attendant at the auction told me it was the prettiest one in the lot. He looked flabbergasted when I told him that I was going to smash it when I got home. He couldn't believe it had been radiated. Well, I didn't smash it. Instead, I set it out in the sunlight to see what happens. This is the "before" picture. Please note the two dings; one on the left on the lower lip and one on the right on the upper lip. If I can remember to do so, in a few months/years I will post an "after" picture.