Weak strike, grease?

What causes this higher surface?

 

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Occluded gas bubbles maybe? I don’t know for sure. I don’t think it is grease, but it could be. Let’s see what other people have to say.

 

A Struck Through Debris / Grease coin usually has missing design features.
I think the high area on your coin was caused by an excessively-cleaned die, note how Abe is all but missing. A high point on a coin is a low point on a die.

 

Lincoln's profile does look higher. Why?.. No idea. The rev. might be Progressive Indirect Design Transfer, a die clash or ghosting. Something like this...maybe.

 

Makes sense, high point coin, low point die, that might work, thanks

 

What caused your penny to be in that condition?

 

I think it has something to do with the strike of the die.

Scroll down towards the bottom of this link...

http://www.lincolncentforum.com/terminology-list-p/

 

http://www.error-ref.com/progressive-indirect-design-transfer/

Islander's coin shows an extreme case of this. Nice coin.

 

Thanks!!! I saved the link. That's it, it's the impression of Lincoln's shoulder from the opposite side, it lines up perfectly.

 

I see your point... low spots, high spots, confusing

 

So I was tired last night, if it's not an impression of Lincoln what is it?