Above is a back style soon after the opening of the Mirage, these cards were purchased in December 1989.
The above back style has a USPC date code dating it approximately 2005. Notice the logo is thicker and the base of one of the palm tree's is located next to the dot in the letter "i" in Mirage. The gold color in the palms has more of a yellowish color.
Above is an image of the cards superimposed on top of each other. The 1989 back style has a shorter wider logo oval. The 2005 cards have a narrow and taller logo oval. and the logo style is thicker. I do not know at this time when the style was changed. I guess I should have paid closer attention.









