Shelby porcelain license plate topper sign measures. This license plate topper features the iconic Shelby lettering in orange, perfect for showcasing your love for classic automobiles. The topper has really nice porcelain on both sides. Whether you are displaying this sign as part of your collection in your man cave, shop, bar, or garage, or giving it as a gift, you can also browse my other auctions for more vintage gas, oil, aviation, automobile, motorcycle, and hunting signs. Shelby License Plate Topper. Bright colors w/ porcelain on both sides.