Possible Lincoln Cent Errors I'd Like Help With Please

jm - you'll find that for Lincoln's beginning in and after 1982 are susceptible to advanced staining/toning. My guess it's because the copper plate over the zinc substrate is so thin and more prone to deteriorating especially where the plating splits. Hydrozincite, or zinc rot, sets in rather quickly and begins to attack the substrate. Devices erode from within to the extent the coin gets a blistered appearance. Some devices 'rot off'.

You'll note that Zincolns (zinc Lincoln cents) left in the car cup holder become rather nasty once exposed to condensate and corrosive liquids (coffee, tea, soda). Once the process starts - there's little that can be done to slow deterioration down.

Here is a link of what is more desirable in the collecting world:
https://goccf.com/t/196018

Also check out the links in my signature line under this post. A few youtube videos you might enjoy. (2.5 hours worth.)

I think I remember reading that in the change over of blanks in 82-84 that they actually had to fire some of the places supplying the blanks because of the plating issues.

I might have that a little mixed up though.

Also. Just a little something.

You should really start to get into the habit of holding your coins by the edges to prevent any more oils or finger prints from getting on them.

Just something to think about unless you already do that.