Vintage Dependable Champion Spark Plug Service Metal Enamel Advertising Sign. Condition is Used, this is evident in the photos I have included, however is excellent for the age. The item “Vintage Dependable Champion Spark Plug Service Metal Enamel Advertising Sign” is in sale since Sunday, August 4, 2019. This item is in the category “Collectables\Transportation Collectables\Automobilia”. The seller is “mark-chivers” and is located in Castle Cary. This item can be shipped to United Kingdom.