Is it time to get rid of the penny and the one-cent denomination in the U.S.? Yes! See how getting rid of the penny in the United States will save taxpayers money AND help coin collecting become an...

Machine Doubling vs. Double Die Coins - I can help you determine whether your coin has machine doubling or is a doubled die. See the differences between these types of error coins, examples of...

What is a die clash on a coin? Die clashes are a type of error coin resulting when two coin dies come strike each other without a coin between them. Coins with post-mint damage can sometimes be...

Think you have some rare penny dates in your coin collection? Here are 23 of the most valuable rare Lincoln Memorial penny key dates you should be looking for -- and how much they're worth.

What is an error penny -- and how much are error pennies worth? Our penny error list shows you which penny errors to look for, common & rare error pennies, unique pennies that look like errors but...