Here's the thread on the Cobb ball. In it you will see a screen shot of the auction listing. It plainly states the ball comes with a full authentication letter from PSA/DNA, and an auction house letter from JSA. There is no mention it is a pre-certified viewing only. Once the ball was exposed as being made after Cobb's death, the spin doctors took over.
http://www.net54baseball.com/showthr...itage+auctions