As you have seen, we’ve been using a number of different backs on our series. Some backs will be found on players for all teams, others are specific to one team. Here are two examples of a special back that will be found on just New York Giant players. I think normally around 4 copies with this back are used with every player. Of course the backgrounds on the front, behind the player image, are almost always different. These two cards will be listed this coming Tuesday on eBay:
Helmar Sports Cards and Baseball History 