There has been a Topps Vault negative up on ebay for some time of a later photo at a much higher price. I have the 67 Mantle Disc on an uncut sheet. I also have his 68 Plak, and while you can recognize the photo in the checklist card, I do not think anyone can "recognize" it in the plak itself
http://rover.ebay.com/rover/0/e11021...xe=exe,ext=ext