Found these two insulators at a 7 day a week indoor flea market where they always have some insulators. Don't even recall if I ever purchased any being they are usually very high priced commons, After at least a couple dozen stops there I walked out with a couple Brookfield's. The green aqua slug embossed 102 has a pot rock on the back side. Figured I would by it even though it wasn't too special after seeing what was in the dome of the 162 on the right. Looks to me like it may be a broken off saw tooth blade. At least that is the shape of the dark mass. Don't think it is a sharks tooth. That would make less sense then a metal saw tooth being is a hot glass molding shop. Because of the way wharever it is is positioned in the dome I can't do the magnet test on it. At least not with the somewhat weak magnets I have. Darn!