Vintage Burger King Porcelain Sign. This vintage Burger King porcelain sign is a great display of American fast-food history. Measuring 11 3/4 and made of porcelain on both sides, it features the graphics of advertising for the iconic fast-food chain. Whether you’re a fan of Burger King or just love vintage advertising, this sign is a must-have for any collector or enthusiast. Graphic of the King with a Whopper. Vibrant colors and excellent porcelain.