I believe the chip on the left in your scan is either N2272 or V9913, that have some type of variation but appear to be the same. Of the three shown in my scan, the center background on the one on the right seems different in color (or could be just dirty). The chip on the right in your scan, with "Las Vegas, NV" is chip number N7864. If anyone has a V9913, I wish they would post it so that we can all see the difference.