It's listed under Casino Magic Corp. on the ChipGuide or in the Slot Card Guide, where cards used at all Casino Magic locations (Biloxi, Bay St. Louis and Bossier) are listed. In the Slot Card Guide the Casio Magic Corp. listing is in the Universal section as mentioned in a note under each of the individual locations. Your card is the 1st issue with the WBM manufacturer mark above the mag stripe.

Here's a link to the ChipGuide page for Casino Magic Corp. where you can see all the cards to compare. Just open the Player's Club Card section if it's not open already.

http://themogh.org/cgupdate/cg_chip2.php?id=MSBIC1

Your card should be the CG002797 listing, here's a direct link to the scans.
http://www.themogh.org/cg_showpic2.php?cg=002797