Vintage Iskenderian Racing Cams Porcelain Sign. This vintage porcelain sign features the iconic Poly Dyne Profile, making it a must-have for any Racing or Automobile enthusiast. Measuring 11 3/4″ in size by 10″, it’s perfect for displaying on a wall or as part of a collection. Porcelain on both sides. 10″ by 11 3/4″. Bright colors for excellent display.