There are two variations of the Circus Circus Las Vegas Ringmaster Club card, the one with the large "R" over Ringmaster. One card has pink stripes and the text under "Circus Circus" is 53mm wide with 2 signature strips on the back, one at the top and one at the bottom. This card is typically found blank with no printing.
The second variation has no signature strips and the text under "Circus Circus" is slightly shorter at 52mm. This second card is typically found punched and embossed with the player info.
Here's scans of the fronts of the two cards, it would be near impossible to see the signature strips on the back.