A List Of More Than 100 U.S. Error Coins By Denomination - see all of the pennies, nickels, dimes, quarters, half dollars, and dollar coins with errors you should be looking for!

Some Kennedy half dollars don't contain the letters "FG" on the coin. See why and where the letters are supposed to be on a Kennedy half dollar. Actually no FG half dollar error coins are quite...

Found a coin with an odd marking on it? It might be a counterstamp! This article will tell you what counterstamped coins are, why they exist, and how much they're worth.

U.S. coin errors and varieties can be confusing to tell apart. How are variety coins and error coins different? Why does it matter? What are these unusual coins worth? Here's everything you need to...

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...

There's a 1965 quarter worth $7,000 because it was made on the wrong metal (silver instead of copper-nickel clad). Here's how to identify a 1965 silver quarter. Plus a list of other rare transitional...