I picked up an R3b (or more likely trimmed R3c) because it looked "off" to me with respect to the facial features. Now that I have it in hand, I'm not sure what it is.
First image (a normal R3c):

Second image (A Hart L. Pierce counterfeit I got from Eric a few years back):

Third image (new acquisition. looking at the eyes, nose, and lips, as well as the upturned hair curl at left, it looks to have more in common with the Hart L. Pierce work than the first stamp, not to mention the perforation similarities)

Looking at R3c's and R3b's I have, there is some variance throughout, but that nose and lip combination is fairly distinctive. Just an oddity or something more?
Thanks,
-Dan