Amazing Spider-man #700 Second Print Variant CGC 9.6 Signature Series comic book, which has been signed by writers Dan Slott and J M DeMatteis and signed by Humberto Ramos, the cover and story artist!
This key issue features the "Death" of Peter Parker and the cover is an homage to Amazing Spider-man #300!
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 investment grade 9.6 (NEAR MINT+) 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 the signatures and grading by entering the 10 digit number on the label at the CGC comics web-site.