I really like the fields on that coin, I am in the XF category. These coins were often struck with problems.
I don't think any below 20, though the eagle shows plenty of wear. ( or weakness? ) Yeah, 20 is my guess.
If the TPG is PCGS I suspect they would have said F15, but a VF20 wouldn’t surprise me. They seem to get more demanding as the late 20’s segue into the 30’s. Or have I just been staring at these ,things too steadily?
Interesting as that is not the original green PCI, but from the time one of the new owners tried to recreate the old holders (and were usually worse in terms of grading).