Invincible Iron Man #55 CGC 7.5 Signature Series comic book from Marvel Comics, which is signed by the following:
Stan Lee - Marvel Comics Legend and co-creator of Iron Man
Jim Starlin - Series writer, interior artist, cover artist and creator of Thanos
Joe Sinnott - cover inker
This super key issue features the first appearances of Thanos, Mentor, Drax, Starfox, Kronos and Blood Brother!
As a guide, a CGC 7.5 signed by just Stan Lee sold for $1,250 (£1,000) in August 2018 whilst Stan was still alive.
It has been professionally graded by CGC, the largest independent comic grading company in the world, and slabbed in a sealed protective case.
The grade is guaranteed to be mid to high investment grade 7.5 (VERY FINE MINUS) and this is a yellow label CGC Signature Series, which means that an authorised CGC representative witnessed the signings and this also acts as a Certificate Of Authenticity. As soon as the comic is signed, it is removed by a CGC authorised party and submitted straight to CGC for grading and encapsulation, guaranteeing the authenticity of the signatures.
You can check the validity of this item and the signatures by entering the 10 digit number on the label at the CGC comics web-site.
There are no cracks on the case. Any glare is just the scanner on the deep well CGC case, which can cause reflection.