I went for a day trip down to Nogales, Mexico to do some Christmas shopping. Outside of the restaurant I ate at was this pole with some glass on it. I zoomed as much as I could to get the best idea what this insulator is. I could see some embossing around the lower part of the shirt, so I'm guess it's a CD 233 Pyrex. Let me know what you think, has anyone see CD 233 in Mexico before?