Here are the reverses of the six Stratosphere cards I talked about in the previous posting. The one in "D" does not really show that the edge is a deep blue color. I wonder if the "D" card could date back further, because it uses the 1-800-99-TOWER phone number that was on the first type ( card "A"). The Turquoise card ("B") that is listed as type 2 and all the others use the 1-800-777-WIN phone number, that they still use today.