Yellow's don't come along very often. Never seen one other than in pictures and never for sale in my local area. I have an ER code just like yours that has never been cooked on. That Yellow is awesome. Wish Weber would have made the Limited Edition kettles yellow instead of red. I guess yellow wasn't very popular back in the day, but given the fact it changes color hot makes the cadmium yellow the most unique kettle Weber has ever produced.