If these are important to you, please reach out to me and I'll be happy to provide more detail on the case. For those unfamiliar with Newton Rings: This is an occasional effect produced by the inner and outer cases being in direct contact with one another. The visual effect is similar to oil on a water puddle because of the two plastics.
Ultimately it is not anything that is in direct contact with your comic, nor will it affect the comic's condition over time. The item "THOR #337 9.8 CBCS White Pages 1st Beta Ray Bill! Loki & Nick Fury App" is in sale since Saturday, July 20, 2019. This item is in the category "Collectibles\Comics\Bronze Age (1970-83)\Superhero\Thor".The seller is "top-drawer-collectibles" and is located in Los Angeles, California. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, China, Sweden, South Korea, Indonesia, Taiwan, South africa, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Israel, Mexico, New Zealand, Philippines, Singapore, Switzerland, Norway, Saudi arabia, Ukraine, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Brazil, Chile, Colombia, Costa rica, Panama, Trinidad and tobago, Guatemala, Honduras, Jamaica, Monaco, Viet nam, Uruguay, Russian federation.