Melting marks

I have found several coins with melting marks like the one shown in the pictures. What would or could cause this in a coin. I don't believe these would be coin errors.

 

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Surface alteration. Please show the entire Obverse.

Not a mint error of any kind IMHO.

 

Damage, not a mint error.

 

I find markings like this often and wonder what sort of heating process was taken to these coins to make a melt like that.

 

You've got to get copper really hot to melt it or even soften it. You can do it, but by then the whole coin will be discolored from oxidation, unless you're doing something fancy with protective gas.

Those are more likely just gouges.

 

Agree with @-jeffB …those are gouges. And, along with the normal wear, is damage that limits the coin to FV…imo…Spark

 

Just damage. No heat involved.

 

It’s damage, that we know. Can’t tell you from what, we’re not detectives.

 

Thanks for the replies.

 

I said this was damaged and here’s why. That crescent groove in front of Lincoln’s face says it all. If you look at that, you can see metal that has been displaced by the raised edges around it. That is one of the things that happens when a coins surface is damaged. Hope this helps. As far as what caused that groove, your guess is as good as mine.