1964 nickle

Anyone have any idea what's happened here

 

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If you're talking about the dark color, it could be improperly annealed (sintered), or what is known as a "Black Beauty'.
@paddyman98 would know better.
If it's the circles on the reverse, then probably post mint damage (PMD).

 

Environmental Damage is usually the cause for a darker color Nickel. I metal detect and have founds hundreds of examples such as your Nickel.
Here are some -


Improperly Annealed Nickels in my opinion are usually found in unopened Mint rolls that are quickly attributed.

 

Can I get some opinions on these as I'm just starting out and learning.

 

Is the second photo close to a full step or 5 step? It kind of feels cheaper then a nickle coin and the rim around the outside looks different. Its 1999

 

1st and 3rd Nickles are damaged.

 

It's the second one full steps or close to 5

 

I see some problems with the continuity of the steps in certain areas. So it's not full steps