All comics, front & back, are visually inspected by looking parallel into a light. I'm not a professional grader, so I give comics a.
Low grade, mid-grade, or high-grade. I have reviewed the CGC/Overstreet grading standards & ranges, and to my best & honest ability, this comic(s) falls into this range. Bought most of my comics 40 to 55+ years ago, Brand New when issued, and have kept them in storage, out of light, and protected in a plastic sleeve & firmboard backing (both acid-free). Never in an attic or basement. I was more of a collector than a comic reader and any flaws are solely from me and/or storage.
Up to 10 times packaged-protected in a comic plastic sleeve, acid-free firmboard backings, layers of cardboard, bubble plastic mailer(s), with a. Ll sides taped/secured with industrial tape and red. FRAGILE DO NOT BEND writings on package.