Is My Penny a Mint Error?
The US Mints will sometimes make mistakes when minting pennies. One mistake is forgetting to add the copper plating to their modern zinc cents. We all have seen or found pennies in our change that look odd, like they are made of steel or are silver in color.
In this video, I will explain the 7 signs to look for to see if you have an actual mint error penny (in this case, a penny struck on an unplated zinc planchet).
Here are the 7 signs to look for:
1. Slightly underweight – 2.42g- 2.48g
a. Most copper plated zinc cents weigh 2.5g or slightly more
2. Smooth surface – no pitting
3. Some or all of original mint luster
a. Circulated cents may lose luster however
4. Fine streaks on 1 or both sides of coin
a. Most planchets have these and without copper plating should see them
5. No copper showing at all, even under a microscope or loupe
a. If any copper, likely de-plated
6. A clear die-struck design
a. Both de-plating and over-plating soften the strike (design)
7. No blisters or any other surface irregularities
a. An extra plating over a copper layer will usually show this
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Is My Penny a Mint Error?
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