If these are important to you, please message and we'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 "AVENGING SPIDER-MAN #9 9.2 PGX 1ST CAROL DANVERS as CAPTAIN MARVEL" is in sale since Tuesday, February 11, 2020. This item is in the category "Collectibles\Comics\Modern Age (1992-Now)\Superhero\Spider-Man". The seller is "supreme-comics" and is located in Los Angeles, California. This item can be shipped to United States, Canada, United Kingdom, China, Mexico, Germany, Japan, Brazil, France, Australia, Russian federation, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Greece, Portugal, Cyprus, Slovenia, Sweden, South Korea, Indonesia, Taiwan, Thailand, Belgium, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Austria, Bahamas, Israel, New Zealand, Philippines, Singapore, Switzerland, Norway, Saudi arabia, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Chile, Costa rica, Panama, Trinidad and tobago, Guatemala, El salvador, Honduras, Jamaica, Bangladesh, Brunei darussalam, Ecuador, Gibraltar, Iceland, Jordan, Luxembourg, Nicaragua, Peru, Paraguay, Viet nam, Uruguay, Aruba, Belize, Dominica, Grenada, Saint kitts and nevis, Turks and caicos islands, Bolivia, Egypt, French guiana, Guernsey, Guadeloupe, Jersey, Cambodia, Liechtenstein, Monaco, Macao, Martinique, Pakistan, Sri lanka, South africa, Colombia, Antigua and barbuda, Saint lucia, Barbados, Bermuda, Cayman islands, Maldives, Oman, Reunion, Montserrat, Ukraine.