Vintage Dallas Cowboys Porcelain Sign. Add some retro charm to your garage or workshop with this vintage. NFL Football porcelain sign. Featuring the football player in the center, this 12 sign is a colorful addition to any gas and oil-themed collection. This sign is perfect as a gift or for any auto shop, man cave or gas station and is an excellent way to display this type of advertising. Vintage Dallas Cowboys porcelain sign. 12 inches in diameter. Vibrant colors and excellent porcelain.