Change after buying beer.

Die Adjustment strike would be equally soft on both the obv and the rev. Lincoln is too strong to be a weak strike. The obverse looks to be struck through grease. The reverse on the other hand is something else. The image isnt just weak it is "mushy". This is what I would expect a very late state capped die strike to look like. Perhaps we have something different going on on each side?

Richard

 

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Spoonig makes sense but... I have seen many times in forum post people saying a dryer melted a coin.

 

I don't think they mean it literally melted a coin. The heat and friction causes the rims of the coin to rise above the fields of the obverse and reverse.

As for the OP, who cares about the coin, let's see the beer!

JK, I think it's probably a struck through grease.

 

It likely was like that when it left the mint

My guess: The planchet (must've been very hot), when it was struck, the die penetrated the zinc layer, and the liquid copper filled the zinc, 'weakening' the strike. That left the 'no strike' mark, eliminating IN GOD WE TRUST, E PLURIBUS UNUM, and the last two numbers of 2010.

Anyway, it was a 2010 D penny (there is a very faint remainder of the D in the right spot, looks best on the pic with the full black background)

 

I agree.

That makes absolutely no sense. Zinc cents have a zinc core with copper plating. The zinc is in the center. For the die to penetrate the "zinc layer" it would have to penetrate essentially the entire planchet.

 

Die adjustment strikes also don't have well defined rims. If you are getting the rims struck up the periferal details will also be struck up.

 

Struck through grease?

 

not damage.

possible set up strike.

 

Our coin munts are so busy nowdays because of so many coins they have to make that quality control is not much at all. This is what a coin looks like after it is struck with clogged or what we call filled dies. at a lot of use the dies becomes filled in with dirt , grease, and tiny metal fragments . This is what caused the 1937 D three legged buffalo 5 cent coin. These modern struck thru coins don't have much value yet because they don't have very much age on them yet. I say just hang onto them and maybe our grandkids can have some cash when they get old like us.Good thought anyway.

 

Cool penny! how ever it was done

 

Rascal
the 37D 3 Legged buffalo was NOT caused by grease filled dies. it was the result of an over polished die where the missing leg was literally ground off while trying to fix damage to the die either from a die clash or a gouge of some sort.

 

Treashunt
A set up strike or die trial strike is caused by insufficient pressure being applied to the dies during adjustment. when this happens the coin shows equal weakness on both faces. This does not show that and is caused by something else. I still say the reverse looks like a capped die strike and the obverse looks like struck through grease

 

Strike thru or an extremely worn die?

 

Looks like something was between the die and the planchet when it was struck. Rounded edge....look at the curve from N to N...this then caused the incorrect pressure through the bottom half of the reverse, resulting in a unbalanced strike. The obverse, looks like grease...so maybe the work that left the grease, left a little peice of something on the reverse die. Just a thought.

 

Struck thru, definately.....cool coin!!

 

A little Chemistry is in order.

When a melting point is given such as 787 degrees Fahrenheit, it is actually assuming standard pressure of about 30 lbs./sq.In. The process of spooning or bending a wire back and forth to 'break' it actually uses pressure and friction to both raise the temperature (by friction) and lowering the melting point due to higher pressure. This is important to the coining process since this combination is what actually produces the images on all our coins as the metal planchets under pressure FLOW into the dies.

The commercial dryers would not be hot enough unless there was some mechanical application of force and pressure. There is in the tumbling mechanism where most of these coins gravitate.

Also, the property of metal that makes them so useful is the property of reaching a point of malleability well below that of the traditional melting point. You see it in iron works at a blacksmiths shop. The Iron is moldable when it is glowing red, but not yet fluid which defines the maelting point.

It is also the counter argument for those who think they have made some point about the collapse of the twin towers when they insist on using melting points well above the point at which structural integrity is compromised.

 

First off it's Physic's not chemistry
When you bend a wire back and forth it causes fatigue and stress fractures that grow as the bending continues. There is heat generated in the process but the wire DOES NOT break because it melted.
One of my hobbies for for over the last 20 years or so involves the melting, reshaping, pounding, and cutting, of metals IE metallurgy, Welding, and smelting.
taking steal to red hot (working temp) is not melting it... all metal has a crystalline structure. iron has a crystalline structure that has carbon trapped within it. At high temperatures (red hot), iron has an FCC structure which can dissolve carbon. which makes it able to be worked easily.
Again a dryer will not MELT a coin! What you are mistaking for Melting is basically a fine sanding. look at lucky coins that have been rubbed over and over by someones thumb. you're fingerprint is a very soft very fine from of sand paper. this is why some sculpture's have features rubbed off them from millions of people touching them.
It surprises me how little people that collect pieces of metal know about metallurgy.

See HOBO I told you people think that dryers "MELT" Coins.

 

Don't drag ME into this mess. It was you who stated the 3-legged Buffalo Nickel was caused by a grease-filled die.

 

never said that... that was rascal

 

Sorry 'bout that. Apparently I didn't look past the ra in the name. No harm intended.

Oh, and you are correct. Some people DO believe coins melt in commercial driers.