A couple days ago, I mentioned that gimmick card with the squirrel. You know the one. Or if you don't, go back and read my post from two days ago!
Not quite a gimmick, this card features an actual canine on duty in Hiroshima.
A variation exists for this card. A standard card back (instead of a checklist back) was made for cards distributed at a Carp game during the 2005 season. That card carries a premium as well; I've never seen one but it remains on my want list for my Calbee type collection.