Posted By:
JasonEveryone gets disappointed with grades, but in my own experience I've come to accept the reality that I have rose coloured glasses when it comes to my cards. That said, I have had issues in the past. Best way is to send it to another grading company and see what they do.
If you want a more instant reply. Post the memorylane Mantle and your Mantle side by side in a nice scan so we can have a look.