30 Vintage Porcelain Red Crown Ethyl Gasoline Enamel Sign. The item “30 Vintage Porcelain Red Crown Ethyl Gasoline Enamel Sign double sided” is in sale since Thursday, May 26, 2016. This item is in the category “Collectibles\Advertising\Merchandise & Memorabilia\Signs\Original\1930-69″. The seller is “saleantiques01″ and is located in KON, MAHARASHTRA. This item can be shipped worldwide.