I know some do not care about such things but others do so I will report a find I made yesterday at Trump Marina. While investing (unsuccessful BTW) I happened to look at a few $1 chips that I had. I noticed there seemed to be a different color in the backround behind the denomination. One seemed to be purple and the other blue. I would not have noticed since I don't normally look for these things but the difference was SO pronounced, I couldn't help but notice! I've attempted to scan the two chips and post them here. The difference is noticable here but much more visible in person. I don't know if there are others like this at the Marina but if you collect 'differences' like this, check for it on your next visit to Trump Marina.