2019 W Lincoln Cent Proof Improper Annealing Error?

I purchased a 2019 W Proof Cent last year and recorded an examination of it. Fast forward a year, and I spotted signs of an improper annealing planchet error, which I missed last year because I wasn't aware of the distinction, until I learned while researching about "overheated or improperly annealed planchet errors" featured on quarters.

Penny for your thoughts?

Thanks for your time and attention. Much appreciated!

 

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That doesn't look like improperly annealing more like an environmental effect caused by improper storage and by the spots my guess would be humidity exposure.Keep an eye on it and I would suggest putting it elsewhere.

 

The video link examination is a year old. The coin came looking that way out of mint packaging. I took it out of the plastic package it came in to examine it, and then stuck it 2X2 flip and put it away. Then, I pulled it out and examined it again the other day after noticing the same issues on a 2021 Sacagawea dollar coin. It's the same type of error. The dollar coin was also from a mint wrapped roll directly purchased from the mint. The 2019 W hasn't changed in a year, but still looks very much the same as the original examination. Thank you for taking the time to reply. Your insight is appreciated!

 

They look like problems created by poor adhesion of the micro thin copper plating. Your third image seems to show plating bubbles.

 

Those are contamination spots. Nothing to do with Improper Annealing.

 

Do zinc coin planchets even get annealed? The annealing process is done to make the planchets a uniform softness to help with die wear and to insure that they acquire a uniform strike hardness. Copper has the property of strike hardness.
Zinc metal does not acquire strike hardness that I know of.
Check out paragraph 3 of step 4.
https://www.usmint.gov/learn/production-process/coin-production

 

I agree that they are from contamination. Tiny dust specks or droplets from someone's breath.

 

I 'm going with @alurid on this one.

 

Ditto with @alurid. @paddyman98 is also correct in my opinion. OP, I enjoyed your post thank you!