Frontier Gasoline porcelain sign features the iconic Frontier Gasoline branding and is made of porcelain. The sign measures 16 across and features the cowboy riding a horse. 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 Frontier porcelain sign. 16 inches in diameter. Bright colors w/ porcelain on both sides.