1985 Jefferson Nickel Coin Error

What caused this coin error?

Before the U.S. mint stamps a coin, it takes the planchet and heat them in an oven.  The mint uses the same oven for all of its planchet.  In this case, the U.S. mint placed the nickel planchet into the oven right after firing copper planchets.  The copper molecules from heating the copper planchet must have remained in the oven.  And, then these 1985 jefferson nickels got copper on them during their firing.

That is how this 1985 Jefferson nickel coin error was made.

How did this 1982 coin error occur?

Sometimes the the coin dies are made at the Philadelphia branch of the U.S. mint.  Once the dies are made, the dies are sent to the other mints where those mints are to punch the mint marks.  For the 1982 dime coin error, some of the dimes that were produces never got the mint marks punched.

The Almost Uncirculated grades of these 1982 coins can be worth some money.  I have seen them on sale between $30 – $40.

So check your pocket change for the 1982 Roosevelt Dime coin error.

Wyoming State Quarter Reverse

As you can see the Wyoming state quarter depicts a cowboy riding a bucking bronco.  On the saddlehorn of the saddle, there is an extra impression of the tip of the saddlehorn.  This type of coin error is called a double die error.

A double die error is caused when the coin die is tilted and shakes during the minting process.  When this minting error occurs, the double die leaves a second impression.  In the case of this state quarter coin error, there is a second impression of the tip of the saddlehorn.

It is always neat when these state quarter coin errors are found.  Do you have any Wyoming state quarters that might have this coin error?