Shell Gasoline porcelain sign features the “Shell Launches its Technical Products” yellow lettering. Measuring 12 inches in size, this porcelain is in excellent condition with amazing gloss. 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 Shell Gasoline porcelain sign. 12 inches in diameter. Bright colors w/ porcelain on both sides.