There is discoloration on the back side when viewed from above. Please check the photos. Startup has been confirmed on a compatible machine and it plays without problems, but it was a little difficult to load. It may be resolved by cleaning, but I haven't done anything in particular. Please understand that this is an old item. Shipping is planned via Yu-Packet Post with slightly thicker packaging. It would be helpful if you could take a quick look at my profile.