This super nice sign is dated 1930 and ready for your collection! Unlike today, spark plugs needed to be clean to work properly, and this sign hung outside of your local service station letting customers know they could get their plugs cleaned for five cents. Some minor bends can be seen on the outer corners, along with a few thin scratches on the glossy face. The black letters stand out nicely against the yellow background, and it is marked “6-30” in the lower left corner. 20334-TQP