Do the grading services not use the RD, RB and BN designations on Flying Eagle Cents?

I've been looking around at these, and they don't have that on the holder. Is that just a fluke on the couple that I've looked at?
Here's a PCGS graded example.
Russ, NCNE
Here's a PCGS graded example.
Russ, NCNE
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Jeremy