My brother and I were hunting the rail line that leads to Laredo, TX back in the early 1990's and picked this Hemingray product from an abandoned pole. Lots of swirly, fizzies throughout. Even a small amber streak. The dome is embossed with the letter "H". Insulator has a bar in the front and a bar in the back. Bar in the front and a bar in the back...gee, I wonder if they serve munchies? Catchy name.....The Insulator Bar.