I bought this Mickey Mantle autograph from a card shop back in 1999 or 2000. The card shop had recently purchased a large collection from someone and this was part of it. It came with a Certificate of Authenticity (which I haven't been able to find since we moved back in July) and a picture of the guy with Mickey Mantle at a card show. The card can be seen on the table in front of Mantle. So while it appears that some of these cards were autographed by Mantle and sold by Upper Deck, I don't think that this one was. It appears that it was bought unsigned and that Mantle signed it at a card show.
I recently notice a serial number and stamp on the back of the card. It card be seen on the bottom left hand corner. I can't make out any of the writing in the circle. I'm assuming this is from the company that provided the certificate of authenticity. Is anyone out there familiar with this stamp/company? Any help would be greatly appreciated.