The Vintage California Route 66 California State Auto Assn. Porcelain Sign measures 16 x 15 inches in black color, featuring the iconic U. This original sign is a collectible piece from the gas and oil advertising industry, specifically representing the state of California Highway. Made in the United States, this porcelain gas sign showcases the theme of nostalgia and Americana, perfect for collectors or enthusiasts of vintage advertising memorabilia.