Error coin

Much better photos Larry, Your quarter has been left in ACID of some sort. The acid attacks the softer metal first and that is the copper core.
As said it is a damaged quarter and did not happen at the mint. PMD
Thanks for the better photos.

 

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Can I just "chime" in now?
It's Acid man! I have a dime just like this and the fine gentlemen here said that it's something acidic.

 

In the one photo you can see a reeded edge on the left side. My first thought on seeing these better photos was it treated with an acid. It’s definitely damaged.

 

Perfect.

Your Quarter was in a harsh/acidic environment which ate away at the copper core that is sandwiched between the clad layers.

Not a mint error of any kind.

I've seen that type of damage many times.

 

Can you please post pictures for me

 

are their any research information pertaining to that subject

 

Why would anyone do research on a damaged coin?

 

Thank for the info.

 

I want to research how acid effects a coin ,surely there must be some kind of information on the subject

 

It's simple. Copper corrodes faster than the Cupro-Nickel Nickel clad. Someone could of just left it sitting in a liquid acidic solution such as vinegar or lemon juice for the right amount of time. Enough time to erode the copper just a bit.

Also think of this. Blank Planchets are cut out from stock sheets. For Quarters is a sheet of Cupro-Nickel cladded on both sides over a copper core. When the planchets are punched you can see the layers. There's no way for the inner copper to be cut a bit less than the clad layer. It's always even.
Put a slice of cheese between 2 pieces of bread. Take a cookie cutter and cut into the middle of the sandwich. All 3 layers will be cut exactly the same all the way through.

 

There are all types of acid that can be used but don’t limit yourself to being in a chemistry surrounding. Many fruits are acidic as well.

 

@Fred Weinberg

https://www.error-ref.com/part_xi_-_non_errors/

Fred has done so. But on the Error-ref website it doesn't go into detail of how the issue in question occurs.

 

appreciate the info,thank.

 

Yeah patty I just read a little of Fred article,thank you very much,every day you live you learn something,take care

 

I have seen the page on Error-ref. Had no Idea that Fred has done different experiments though.

 

Top one has a bump in it. That’s all I can tell. Show the whole coin for better results

 

Good answer

 

Have you mentioned the date ever

 

Here's a little something in regards to acid & copper.