Vintage KLG Spark Plug Enamel sign. The item “Vintage KLG Spark Plug Enamel sign” is in sale since Saturday, March 13, 2021. This item is in the category “Collectables\Advertising Collectables\Advertising Signs”. The seller is “comingaroundagain2013″ and is located in Shifnal. This item can be shipped to United Kingdom.