What caused this and whats it called? (1989P Lincoln Cent Reverse)

Saw this and was just wondering how it happened and what it would be called. Its strange to me because it didnt affect the letters in United.



Thanks for any info! :thumb:

 

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are you talking about the circle inside the rim?

[you really have to be clearer in your questions. Note to all: that goes for everyone. Lately the posts have been very vague.]

Mike Diamond has answered this before.

I forget the reasoning, but there is no added value.

 

Mike called it die deterioration in which a ridge forms just inside the design rim.

 

Thanks, Rockdude.

 

Yes thanks Rockdude, I thought it was pretty clear when I stated it didnt affect the letter in "United", I figured people would clearly see what I meant. But from now on Ill be sure to be very specific.

 

It could just be an optical illusion, but die deterioration would result in a raised ridge around the inside of the rim. On the coin it LOOKS like it is a depressed area inside the rim. Is that what it is or are my eyes playing tricks on me?

 

The internal side of the ridge has a very broad, shallow, almost imperceptible slope. The external side of the ridge drops off abruptly.

 

I think the depressed area juxtaposed to the rim was caused when the planchet was rolled making the rim. The groove was on the planchet before the coin was struck. IMHO

 

Yes its a depressed into the coin. Makes it way about halfway around the inner edge.

 

Thanks for the opinion, So are we calling this die deterioration or something else entirely?