Casinos are looking for ways to minimize costs for their lower-denom rack chips these days.

One way is to use a smaller inlay diameter, as on this chip and some other recent ones.
Another way is to print the H&C (GPI/Paulson) manufacturer's mark on the chip rather than use UV stamping.
As this Palms chip is a house mold the H&C needs to be somewhere on the chip, per Nevada Gaming Regs.
(If it was a H&C mold, then no need to print the H&C on the inlay.)

I haven't seen the chip under blacklight, but I'd be surprised if it is marked, since cost-saving is the objective here.

If I have any of this info incorrect, anyone feel free to set the record straight.