You are buying an amazing 1998 Mark McGwire 24K Gold Card from the Twenty Four Authentic Images MLB Team Gold 1998 Collection. 

This item comes with the original Certificate of Authenticity from Frank J. Walsh (please see photos) at Authentic Images. 

This is Card is # 365 of 1000, it is enclosed in a very thick plexiglass case inside of the original Authentic Images padded case