I have a Mobil Gargoyle sign that I would like some info on. It is about 20x14 approx with the word Gargoyle over the red image with Mobiloils in larger letters under it. On the bottom it says "A grade for each type of motor" The sign is porcelain and in fair shape. I have a pic but dont know how to post it. Any info on era , value, etc would be greatly appreciated. By the way , this is my first post . Hello to everyone. Glenn