Finning on LMC

I believe this is a LMC with finning.
http://www.error-ref.com/finning/

The first thing I noticed was that the rim had a really sharp edge and was thick. The rim is wider than normal, You can see extra metal that goes almost completely around the coin.

At it's thickest point, the rim is noticeably thicker than a normal coin. The finned coin is on the bottom.

On the opposite side it is closer to a normal coin.

The coin weighs 3.14g

 

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Hey nice not only is it a finned rim but thats a proof strike.

 

I don't know how common these are, but it's a nice addition to my collection of different types of errors.

 

I found this one

 

That's a nice strike! I can't tell by the picture, is that one also finned?

 

Not sure,

 

I also have this 1969 it's a little bigger on one side my camera ain't the best

 

No it is not. A proof coin from 1974 would have an s mint mark.

 

Your coin is not a proof. It is a circulation strike.

 

Yea, it's not proof. A finned coin is caused by an abnormally strong strike, so it will give a really strong detailed strike, but it is a business strike.

 

Your right. I mix up 1968 and 1978 all to often.

 

What about this 1969 S

 

Nice 69-S. However those coins aren't proofs, even though they feature the S mintmark. San-Francisco made both buisness strikes and proofs from 68-74 I believe, and after that San-Francisco only made proof strikes and more recently special mint sets.

 

In 1969 they struck proof coins and circulation coins.

 

SorenCoins beat me to it.

 

In 1968 San Francisco started to mint proof coins. Prior to 1968 they were minted in Philadelphia.

 

I got a few of them one second

 

In 1968 they also minted coins for circulation, Yours is a business strike.
Here's a link that will help you.
https://www.usacoinbook.com/coins/small-cents/lincoln-memorial-cent/