Larry;
The order of issue as best I know it was:
The purple card was the first slot card.
It was followed by the plain white card when stock ran out in Jan 2002..
Then the brown card with rocks came out,the current slot card.

The other cards are bingo cards.
The first was the grey background "Players Club"
It was used only a short while, people were trying to use them in the slots since it said "Players Club" so it was replaced. Some unissued got out to collectors but very few issued cards got into collector hands, Thus your new card is quite a find.
The second bingo card was grey card with bingo balls "Bingo Club".
The third bingo card is the orange card "Bingo Club" that is the current card.
Let me know if this explains everything ok.
Jim