I will be breaking up a partial set of 1997 Skybox Precious Metal Gems Football - each is graded as BGS Authentic. They are all missing the serial #. That they bear the designation "altered" is a bit odd for a standard missing serial number. These are great to use as set fillers until you can find the real thing - the condition on these is immaculate and better than most anything you can find that was pack inserted, generally in the mint range. A nice bunch!  Thanks for looking.