Posted By:
qualitycards"That said, I understand that there is a way of telling the "vintage" of a PSA grade by reference to the design - and presence or absence of holographic seal - on the back of the card."
Keep in mind you can have an old slab reholdered, that will maintain the old cert # but will have a brand new current slab. So with that in mind, it will be hard to detect when the card was graded based on your assertions.