2020 Lincoln Cent Error / Tooling Error / Die Trail

Those are called die scratches. And sometimes they are Feeder Finger Damage. Die scratches and Feeder Finger Damage is removed by polishing the dies to remove the clash marks or die scratches that area left from the FF damage. The FF damage requires a deeper polishing. Most of the time on some design the nose/brow areas are affected.
Die polishing. How does that affect the coins?
http://goccf.com/t/323932&SearchTerms=CoopHome
Feeder finger Damage
http://goccf.com/t/313074#2893073

There are all sorts of similar marks in the cheek and back of Abe's neck as well as under his beard. I wish we had an overall photo (both sides).

I usually see feeder finger gouges on the reverse of the coin on shield cents, not the obverse. Hmmmm I've seen something similar on a 2021 recently at various stages depending on the coin but, not on a 2020.

hi coop, yes I think this is very likely now. if this is the case, and this is a 2020, then they started doing the inverted die installation in 2020. I know the feeder finger scrapes on shield cents were all on the reverse 2019 and prior. I saw some 2021 examples with scrapes in front of Lincolns face and had thought they just inverted this year or inverted installed on accident a die pair or two,
but this example if it's a 2020, suggests it was a change made in 2020, and not a one off set here or there set of dies installed inverted, but how they are doing it now. scrapes are now on the obverse instead of the reverse.

could be overzealous die abrasions though I think, something like that.
I think Denver inverted their dies in 2019, maybe Philly followed in 2020 liking their strike results and wanting the same?

Thanks for all the Replys , I was using a Micro Microscope trying to get these photo's since a do not have a copy stand to balance the scope , I need 3 hands it took better part of over ( 1) hours just to get these pictures , balance the coin, hold microscope and then try to click on the mouse take picture So no Reverse is available currently.

these are OK examples of the 2021 one that's been turning up.
https://www.ebay.com/itm/2021-P-Lin...383959363762
https://www.ebay.com/itm/New-2021-P...383952149418

pictures aren't great, it's ebay, but it's quite a bit of it in these pictures, it's got to be feeder fingers scraping across the anvil die face I've seen others besides the ones on ebay.
I have no idea what they are doing, maybe it's due to the horizontal presses, just choosing to inverted install the dies in some cases.... maybe no preference one way or the other....

ive seen 2019 with feeder finger gouges on either side also.... I think it's safe to assume 2021 will show up with them on the shield side at some point also.