Vintage Lost Dog Porcelain Sign. This vintage porcelain sign features a striking black color with the words “Lost Dog” prominently displayed at the top. Measuring at 10 inches by 8 inches in size, this sign is a great addition to any collection of gas and oil memorabilia. The sign is also ideal for those who enjoy vintage advertising and collectibles. His sign will enhance your man-cave, collection, speakeasy, shop, or garage. Vibrant colors and excellent porcelain.