What would you call this?

I looking at whats going on with the reverse at AM in AMERICA.

 

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Beautiful large cent my first thought was a die crack but the rim is leading me to strike through.

 

Planchet flaw

 

Cracked/flawed planchet, aka lamination.

 

I agree, it is a planchet flaw. If it flaked off, it would be a "lamination," but it is retained.

 

Really lamination i know they can occur on coins as old as this.Haven't see much on pre 20th century coins.

 

Cracked Planchet.
Just on one side. Can we see the edge?

Not a lamination.

 

The planchet was defective when the coin was struck.

 

physics-fan3.14, posted: "I agree, it is a planchet flaw. If it flaked off, it would be a "lamination," but it is retained.

Actually, it is a planchet flaw. As soon as the metal separated on a plane, it became a lamination. If the split part broke off, it would be a detached lamination.

paddyman98, posted: "Cracked Planchet."

A cracked planchet is a planchet flaw. Cracked planchets GENERALLY are vertical cracks whose two edges eventually come together and close. The peeling on this coin runs along the rim when it reaches the edge.

 

Thanks folks. I understand this better now.

 

Put some coin care on that reverse and let it soak a short time. Then remove the green crud around the letters.

 

I may do that some day. Been thinking about it for over 20 years. I have a lot of old copper that could use a bit of help.

 

I would not use it but I still have a bottle of Blue Ribbon from 30 years ago.