Looks like there were two variations of the 7th issue Cal-Neva Cash Club card from Reno, NV that were previously not documented or listed separately in the guides.

Here's scans of the common front and the two different reverses. On one card the reverse text is closer to the mag stripe, down approx. 17mm from the top of the card. On the second card the reverse text was moved down and is approx. 20mm from the top of the card. It looks like they moved the text to make room for a wider mag stripe that may or may not have been used.