1/2 pipe thread antique RED HEAD primer spark plug with a nice tall top. Looks in good shape in my opinion. The item “Antique Red Head primer spark plug hit miss stationary engine truck scta model t” is in sale since Wednesday, March 09, 2016. This item is in the category “Collectibles\Transportation\Automobilia\Spark Plugs”. The seller is “glwsunnybrook555″ and is located in Creston, California. This item can be shipped to United States.