Here's a Net54 link from 2006 (with later discussion from 2011) regarding these cards. Some of the images have been removed or are not available, but it sounds as if the discussion was about the 12-card strip and maybe even a 15-card strip(?).
http://www.net54baseball.com/showthread.php?t=80354
It's interesting to note the speculation about who some of the cards are modeled after.