Vintage Double Sided Coca Cola Porcelain Sign. The item "Vintage Double Sided Coca Cola Porcelain Sign" is in sale since Sunday, June 16, 2019. This item is in the category "Collectibles\Advertising\Soda\Coca-Cola\Signs". The seller is "clinkidwel0" and is located in Schertz, Texas. This item can be shipped to United States.