There were already 2 versions of the 10th issue gold card listed in the guides from the Palace Casino in Biloxi, MS but a new variation was just discovered. The 9th issue card doesn't have the location in the reverse logo. The first listed 10th issue added Biloxi, Mississippi to the logo and there were 7 lines of text in the reverse paragraph and there is a period at the end of the insert line on the front. The second 10th issue card removed the period from the insert line and there are only 4 lines of text in the reverse paragraph. The bottom line of text on the reverse of that card is 72mm wide.
The new found 10th issue gold card has the same insert line with no period, 4 lines of text in the reverse paragraph -BUT- the bottom line of text on the reverse is only 62mm wide.
Here's scans of the new found card with the 62mm wide line followed by the originally listed card with the 72mm wide line.