Off-center strikes are relatively common mint errors, but the degree of off-centering, such as 45% in this case, makes it rarer and more desirable to collectors. A curved clip error occurs during the blanking process when a coin blank (planchet) is punched out of a metal sheet. If the punch malfunctions or the metal sheet is misaligned, the coin blank may end up with an incomplete curved edge.
In this case, the coin has a 45% curved clip, which means approximately 45% of the coin's edge is missing in a curved shape. The fact that these errors occurred on a Lincoln Cent, which is a widely collected and iconic series, adds to the coin's appeal. Many collectors specifically focus on mint errors within popular coin series like the Lincoln Cent.
Coins with multiple significant errors are relatively rare, and each error on this coin - the off-center strike and the curved clip - adds to its uniqueness. Collectors are often drawn to rare and unusual mint errors like this one for their collections. The combination of multiple errors and the coin's grading by a reputable service like NGC can significantly increase its collectible value.
The rarity and demand among error coin enthusiasts may drive up its price in the numismatic market. Overall, a NGC UNC DETAILS Struck 45% Off Center On 45% Curved Clip Lincoln Cent Mint Error represents a remarkable example of a multi-error coin. It's a testament to the variability and complexity of the minting process and holds a special place in the hearts of collectors who seek unique and intriguing pieces to add to their collections.