Esther, (and everybody else), did you know that there is a further variety on these Harrah's that have the city name in top left corner and 1-800 on the reverse? There are 2 different bottom slogans. One is "Bet with you head, not over it" and the other is "Know when to stop before you start". I am not sure if both varities appear on all cards. Laughlin has both varities, but we have not confirmed the other locations. My Black Hawk and Central cards both have "Know when.." What do your backs have?