Sinclair Gasoline Double Sided Porcelain Flange Sign. Approx 17 1/2" x 18" , great condition. The item "Sinclair Gasoline Double Sided Porcelain Flange Sign" is in sale since Friday, October 9, 2020.This item is in the category "Collectibles\Advertising\Gas & Oil\Merchandise & Memorabilia\Signs". The seller is "calasa31" and is located in Miami, Florida. This item can be shipped to United States.