Stewart Warner Instruments porcelain sign measures 10 and is in excellent condition. The sign has large lettering across the top. 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. Vintage Stewart Warner porcelain sign. Bright colors w/ porcelain on both sides.