Vintage Conoco Gasoline Porcelain Sign. This vintage porcelain sign is a must-have for collectors and fans of Conoco Gasoline. With its vibrant colors, this sign is sure to catch the eye of anyone in the room. The sign features the iconic Conoco Gasoline lettering, making it a unique and amazing addition to any collection. Whether you’re a fan of gas and oil memorabilia or an old automobile enthusiast, this sign is the perfect piece to display. This sign will enhance your mancave, collection, shop, barn, or garage. It is your chance to own a piece of Conoco advertising. 11 3/4 inches in diameter. Vibrant colors and excellent porcelain.