I have a couple of quarters that have lines going across…

When a coin is struck, it should be produced from dies that are clean and free of any residues, debris, or other random objects so that when the dies come together to strike the planchet, a perfect strike will result. If, however, there is something between the dies or on the dies or planchet, the result will be a “struck-through” error, resulting in part or even all of the design missing on the coin.

Struck-through errors are the most common mint error type, and it is a very broad category comprising many variations. It is also one of the most dramatic mint error types, with the error often being obvious to the unaided eye. There are two basic categories of struck-through errors. The first is just called a “strike through” and the second type is called “struck-through and retained.” Both types are related, since all struck through “something,” with the difference being if that “something” was retained on the coin or fell away after strike.

In terms of value, such pieces are usually worth about five to 10 times more if it has the object retained on the coin. This is a rough guideline, and the value will vary depending primarily on how dramatic in appearance the retained item is. An American Silver Eagle carrying a strike through might be worth $100. But an American Silver Eagle with the strike through retained on the coin can fetch $500 or more. A coin with a really unusual strike through, such as a Washington Quarter with a large piece of black plastic struck into and retained on the coin, could command $1,000 or more, whereas a strike through of that same piece of plastic (but not retained) might be worth only $100.

Strike throughs are often sold for $1 to $50 in most coin series, but large strike-through errors (those covering 25% or more of the coin) can be much more expensive. Additionally, some coin series are scarce when it comes to yielding even [unretained] strike-through errors and may command a higher premium.

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