Hello,
I have 14 copies of Amazing Spider-Man #361. They all look fantastic to me and very high grade except for the same "manufacturing defect" which appears at the bottom of all issues I have. I think it must be a manufacturing defect and not related to the storage as the only affected comics are these. The comics that are in the same box before and after (ie #360 and before and #362 and after) do not show this defect.
I have attached a sample of one front cover (copy F), one back cover (copy G), and an inner page.
Here is a link to imgur page which shows more pics that are higher resolution of a couple of front covers, a back cover, and more closeups of the "defect". But, the pics shown here are representative.
What would the condition be? Since I have so many copies, this will make a difference in the overall value. Thanks so much!