Found this on eBay:
http://www.ebay.com/itm/PS1-154-WIPE...item2eca6d7bc7

When looking at the picture one sees that the Playstation logo is missing in the upper left corner and the text "Playstation" has been removed. The printing on the disc looks really weird and kind of distorted. I'm fairly sure this is an illegal copy. Correct me if I'm wrong though.