I got a text from the person I bought the last set of insulators from off Craigslist. He found *another* blue Hemingray signal in an estate sale. He said that from what he understands, the insulator was found inside the wall of a house on the Northside of Pittsburgh (north of the rivers) along with the two bottles in the next picture [id=480977557]. Perhaps they were used in this area? The photo shows the first one I bought on the left [090] and the new one [240] on the right. New one is much lighter and more purple than the first one, and has sharp drip points (2 open bubbles and half a dozen underpoured drips, others all perfect).