There would have needed to be more than one card to launch the game obviously. I guess there was once a card that was created before the others, probably some sort of test card, I doubt that any of the current cards where in the launch version. I remember another thread similar to this, someone mentioned that there is some sort of serial number listed on the card database that will roughly tell you how old each card is, I never checked it out myself.
If you go in the round tester ( http://www.urban-rivals.com/game/rules.php?show=abilities in the bottom)you can see that last on the list are piranhas,rescue,freaks etc. which means that in the top of the list are the first clans of this game.then if you go in the cards section of the montana(the first clan) you will see that the first cards were pino lino borsa don and ottavia.
i hope i helped!!!