The 9th issue red Desert Diamond Club card from Desert Diamond in AZ originally did not have a manufacturer mark but there is now an identical card with the PG mark on the reverse. Both are now listed as variations of the 9th issue since a newer 10th issue was already listed.

Here's the originally listed card without a manufacturer mark
http://themogh.org/cgupdate/cg_showpic.php?pic=../cg_pix/az/92987.jpg&picr=../cg_pix/az/92987a.jpg

and the newly found card with the PG
http://themogh.org/cgupdate/cg_showpic.php?pic=../cg_pix/az/084538.jpg&picr=../cg_pix/az/084538a.jpg