missing clad layer?

Are these coins missing their clad layer, and id so are they worth much?

 

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Is The Reverse side the same?
Your Dime is that color because of Environmental Damage. It was affected by being buried in dirt or soil. I metal detect and have found hundreds of Dimes such as yours that were also affected.
Common in Coins with clad layers and nickels also

 

Yes the Rev. is the same. Would it be different if only one side was like this? And why is there a website showing coins missing their clad layer that look identical to these?

 

Yours may look like yours but it is not. Missing clad layer only mainly occurs on one side of a clad coin.

Here are examples from my metal detected coins.. I have thousands of these damaged Dimes and Quarters!

 

Here are examples from my collection -
They also weigh less due to the missing clad

 

Now I been collecting a long time. Granted errors are not my area of interest... But how the dickens does this happen? I can't seem to paint a scenario in my mind that would make this occurrence feasible. Neat stuff!

 

When strips of metal are created to strike Dimes or Quarters they are cladded. 2 sides are mechanically bonded to a copper core. Sometimes one side of the clad is missing. So when the blank planchet is cut out of the strip of metal it is missing that one side then it is struck.
@cpm9ball has a great example on a Kennedy Half Dollar

 

Weight is key, because the copper layer and the copper-nickel clad layers are different specific gravities (weight per cubic whatever).

If you get 1 layer of copper and just 1 layer of CuNi, rolled out to standard dimensions and cut into a blank, it won't be the same weight as 2 layers of CuNi + 1 layer of Cu rolled to standard dimensions and cut into a blank.

 

The technical term is 'dirty'.

 

@gslittlebit

Probably the most common way that the clad layer separates from the copper core is when the roll of coin metal nears the center of the roll during the "blanking" operation where the curvature is the tightest. (I hope I was able to explain this clearly.)

Below is my 2001D Kennedy half dollar missing the reverse clad layer. It still has its original mint luster and color. I found this in a $100 Mixed P&D Mint bag that was released in 2004. There is only one other known for this date/mintmark. As a rule, the larger coins with this type of error are easier for Mint employees to spot. That is what makes them harder for collectors to find.

Chris

 

It's a dirty story of a dirty coin,
And its clinging owner doesn't understand.
His son is working for the Daily Mail
It's a steady job,
But he wants to be a paperback writer,

 

The strip is created from three ingots of metal, two of copper nickel and one of copper. These are stacked and bonded together using very high pressure rolling (Before rolling the surfaces of the ingots that were going to be in contact with each other our ground very smooth and thoroughly cleaned. This is done to provide maximum contact between the surfaces during the rolling.) After the ingot layers are bonded, lower pressure rolling is used to finish rolling it out into strip. In theory, the entire surfaces between the layers are firmly bonded together. But sometimes there will be areas that do not bond together properly. If the planchet is cut from one of these areas the outer layer is not well bonded to the copper and may fall away either before or after striking. If the planchet is cut from an area that overlaps a well bonded area with a poorly bonded area you get a clamshell lamination. Whether the outer layer falls away before or after striking the final coin with a missing layer will be significantly, roughly 25%, underweight.

Weight is the key, but simply because the layer is missing. Copper and copper nickel have nearly identical densities and specific gravity. Specific gravity of copper is 8.96, nickel is 8.90, coppernickel is 8.92.

That would be correct but coins with a missing clad layer are almost never made from just two layers of material rolled out to the proper dimensions. They are almost always from a planchet that had all three layers originally and the outer layer from one side has fallen away.

 

Thank you

 

No problem. You are very welcome.

 

Keep at it and it'll make a fine figure skater one day.

 

How did i know you would have a few of those coins. You are a collector bad ask. Great coins

 

Cool find Chris!

 

Thanks!

It's the first (major) error coin that I ever got direct from the Mint. It's certainly one of my favorites because it only cost me 68c. The 200-coin bag cost $135 from the Mint.

Chris

 

Thanks!

Chris