So Help Please! Is This Some Error Or Cleaning (2007 Cent)

What does the reverse look like?

To CCF! What does the reverse look like?

to the CCF!

Thanks so much for the warm welcome already really enjoying the site!

Does this affect the coins value at all? Or is it still worth .01? I think anyway cool add to a collection . Would it be worth having it graded? What do you all think ?
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Mike, I opened up some string rolls of 95P. These coins were new and never been circ. They ranged from a little spot to almost completely un plated. Out of about 20 rolls, I ended up with over 2 rolls of them. I'm sure there was a problem with the plating tubs they used to plate them. Here are a few of the coins I found.

Bing's AI tool provided one answer: Solid-State Diffusion:

Diffusion in solid-state materials occurs when different materials mix together at the atomic level within a solid host material.
For diffusion to happen, there must be a concentration gradient, and the rate of diffusion is significantly influenced by temperature.
Metallic solids have atomic vacancies and other small-scale defects that allow atoms to exchange places.
High temperatures are often necessary for atoms to have sufficient energy for exchange.

Copper-Plated Zinc Pennies:
Post-1982 pennies consist of a zinc core with a copper-plated shell.
When these pennies are subjected to elevated temperatures, an interesting phenomenon occurs.
The copper layer on the penny appears to disappear, leaving behind a zinc-colored surface.
This disappearance is due to the diffusion of copper into zinc.

Why Does This Happen?:
The copper and zinc atoms at the interface of the penny experience a concentration gradient.
As the penny is heated, copper atoms from the plated layer migrate into the zinc core.
Eventually, the copper layer becomes thin enough that it seems to vanish, revealing the underlying zinc.

Practical Implications:
In engineering applications, metals are often chosen for processes carried out at high temperatures.
Undesired diffusion processes can occur, affecting material properties.
For example, if copper plating is too thin, zinc can diffuse through it and interact with the underlying material (e.g., steel).
In summary, while zinc plating on copper is technically feasible, diffusion of zinc into copper does occur. The resultant material at the interface may even become brass due to this diffusion process

Thank you for posting the results of your experiments, J-tal. I notice that with the first cent, the color of the copper in the outer ring has also been changed a bit. This is not the case with the cents posted by Cujohn. However, I expect there are ways to produce a solid-state diffusion effect without altering the color and luster in the outer ring. Solid-state diffusion may occur spontaneously for all I know, although I'm no metallurgist and cannot speculate on the necessary conditions. All I'm confident of is that Cujohn's coins and the innumerable other examples I've seen over the years do not represent incomplete plating errors. They may not all be fakes (i.e., intentionally created), but I'm confident that the zinc bulls-eye forms after the coin has been struck. Creating even more confusion is the fact that some incomplete plating errors do assume a bulls-eye pattern, although they look very different from these presumed solid-state diffusion cents.