Vintage COCA COLA Advertising Porcelain Enamel Tin Sign Plate. The item "Vintage COCA COLA Advertising Porcelain Enamel Tin Sign Plate 20'" is in sale since Friday, December 29, 2017. This item is in the category "Collectibles\Advertising\Soda\Coca-Cola\Signs". The seller is "zhasmiklinkov_0" and is located in Sofia, Sofia. This item can be shipped worldwide.