This is a vintage porcelain enamel NGK start plug advertising signboard. The entire signboard is painted white. It has NKG branding in the center with the product just below the branding. The signboard is shaped in a raised manner. The NGK porcelain enamel signboard has some minor signs of wear that can be seen in the photos. There are no dents or scratches on it, and it is in excellent condition. It originated in India.