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Never saw one like this before.

Nick, you need to tell me more about this electromagnet principle. I'd like to enlarge some gold coins I own.
 
Its a bad planchette or a broken die. Look at the rim, there is material outside of the raised rim. There is what looks like a crack in the memorial. Also the rim is messed up near the bottom, under Lincoln, by date. The foundation of the memorial is not straight, it is wavey.

Look REAL close (7x to 10x loupe) and compare to a good penny. I will bet you will find many other flaws that will sugest mint error. My bet is on a broken die.

Hope you got a previously unknown error coin.
Jeff
 
I don't believe this is a mint made error, but rather a coin that was put in a large mechanical or hydraulic press used for stamping sheet metal parts, maybe somewhere between 600 and 2000 tons, and given a squeeze. The coin was not impacted, but simply pressed. The raised 'railroad wheel' edge gives it away.
 
That is a very small impression and often appears as a faint blob on uncirculated coins. Count the steps leading up the Jefferson memorial on the back of a Nickel. There are supposed to be six but often times it is one large "leap" as all the steps have fused together.
 
Ok smarty pants! :biggrin: It expands or condenses the coin, it does not add or subtract any metal.

http://205.243.100.155/photos/ShrunkenCoins1.PDF
Google "shrunken coins" and it should take you to the Stoneridge Engineering website with more information.

As far as enlarging, there is patent 3964284, Method of expanding coins for decorative purposes:
A method of expanding the diametric size of coins and retaining the impressions, embossings, stamping definitions, or the like, thereon for use in jewelry, medallions, and the like, and which comprises initially placing a coin between two layers of carrier metal having a fluidity different from the fluidity of the metal of the coin whereby the carrier metal expands faster or flows more readily than the coin metal, applying pressure against the coin and carriers until the carrier material and coin metal begin to flow from the center out, removing the slightly enlarged or expanded coin from the initial carrier members and placing the enlarged coin between two additional layers of carrier material for repeating the process until the coin has been enlarged or expanded to the desired end size.
 
Hi,

It is a coin that is what we call , environmentally damaged. That means that anything such as acid, or being buried, for example removed the plating after the coin left the Mint.

In reality, soaking a zinc cent in your favorite cola flavored soft drink will actually cause the same effect over time.

The size was altered , either by placing it between two pieces of leather and hammering it, or heat was used to expand the zinc.

It is not an error of any kind.

Thanks,
Bill
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That's exactly how it happened!! Take a coin, especially a 1 cent and place it between two leather belts and give it a couple of whacks with a hammer. There shouldn't be any marks on it as you have a buffer between the hammer and the coin. check it out!!

You are getting some very good advice here, my friend... if I were you, I would listen and learn.

You might want to do some little experiments on you own to see all the different ways that people are telling you that a coin can be altered/damaged. Take three common LMCs, stack them and put them in a vice. Squeeze the hell out of them and then check out the one that was in the center. Where there is a will.... there is a way.

www.cointalk.com
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Okay... did you notice the edges?? Compare the gray one to the regular.. see any differences? Sorry, but it did not come out of the mint like that... photo prove it. Seriously, try doing as others have said and see what you get. Using a thick leather belt will protect the coin from hammer marks. Give me a day or so... Ill try to see how close I can come to making one that looks like yours.
 
if you enlarge the picture you can see lincoln. its a lot harder to see than the copper ones.
 
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