by The Jumping Frog
Sales Rank in Entertainment Collectibles: 50 (previously unranked)(Visit the Movers & Shakers in Entertainment Collectibles list for authoritative information on this product's current rank.)
source https://www.lifetechnology.com/blogs/life-technology-holistic-health-products-blog/6-facts-about-champion-spark-plugs-engines-booklet-1957
