The anvil effect on the opposite side means this indentation happened after the strike. The shape is also inconsistent with a RTM along with the fact that it is on the bust. A RTM in that area would be expected to be obliterated by the metal movement to fill the area of the bust.
You can see a more extended discussion of RTM in my paper at this link:
https://conecaonline.org/rockwell-h...ncoln-cents/As an update on this paper, I was recently disappointed to hear from Mike Diamond who just examined the coin I featured in this paper as having likely RTM. He said "Upon examination under high magnification, a (sic) was able to detect a very subtle, very diffuse pressure ridge around each circular pit." I am waiting for him to return the coin now and plan an attempt to see what he is talking about. The marks (there were 2 of them on my coin) must have been subtle indeed, because he also said that they were too subtle to capture digital images!
I am not going to give up the search even though I think that my chances of winning the Lottery would be better than finding a RTM!!
I have established a couple of data bits about RTM

The mint scraps all planchets which have been tested, so it would be less likely one would escape and go into production.

The fact that they scrap the tested planchets illustrates their determination that, depending on the orientation of the planchet in the striking chamber, the RTM could survive the pressure of the strike.

Were dies to have a RTM on the face of the die, the coin struck would have a raised bump. However this cannot happen, because the dies are tested on the neck of the die and not the face.
Edited by Pete2226
06/29/2019 2:13 pm