Check the amazing coin in our primary picture (to the left). It is clearly a US Indian Head Cent, but one side is missing. This is an error coin produced at the US Mint in error. The coin has been authenticated, graded, and encapsulated by NGC, the Numismatic Guarantee Company. The coin is currently at auction by Sullivan Numismatics, a well-respected dealer in error coins. We will not know the selling price until the auction ends, but it will probably be several hundred US dollars. CoinQuest thanks Sullivan for use of their coin image.
Uniface coins are almost impossible to evaluate without an in-person inspection. Once professionally evaluated, they should be encapsulated and annotated with the reason for the uniface. These coins can be quite valuable, up to hundreds of US dollars (sometimes more), but they can also be worth zero. The deciding factors are (1) whether or not the error occurred at the mint, and (2) what minting processed caused the error. There are six basic categories. The letters (A), (B), ... (E) refer to our figure to the right.
Banahan David | I have a penny that is possibly a die strike or or a die cap error. Only the back is struck. How can I determine if it has any value. - 10 months ago
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CoinQuest | Hi David -- It is probably worth something as long as it is a true minting error. That is, an error produced at the mint as opposed to outside the mint. A professional or knowledgeable collector will have to look at it to be sure, but you can get an idea by searching for 'die error' on eBay. Also, please check our small collection of error coins at the link shown here. - Link: [coinquest.com] - 10 months ago
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Trudi Morrison | I have a 1958D penny that is blank on the reverse side. Is this a mint error coin? - 9 months ago
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CoinQuest | Yes, Trudi, it is probably a minting error if it looks like one of our pictures, (A) through (E), on this page. Sometimes, however, people test their grinding tools with coins. If the back of the coin shows grinding streaks, scratches or marks, it is not an error coin, but post-mint damage (PMD). Coins with PMD are worth zero. Coins with errors inflicted during the minting process are worth money, as described on this page and on the pages shown at the link: - Link: [coinquest.com] - 9 months ago
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