The PCGS Counterfeiters are getting too good. Watch out!
So I came upon this California commemorative on eBay (it's listed now and by a seller whose two negatives out of 12 total were for selling counterfeit coins):
The insert looked a bit off. For example, on all other coins graded by PCGS, the spacing between the grade and the type is not equal to what is shown on the counterfeit.
I did a little bit of digging and found the original coin, sold back in 2018:
If you are doubtful as to my claims (and this is why I am not listing the actual auction), there is also slight toning on the real coin vs. the bright white appearance on the counterfeit.