Some state quarters feature mint marks that are misplaced or incorrectly placed. Collectors seek these errors because they are rare and can significantly increase the coin's value. Misplaced mint marks can occur due to errors in the minting process.
Double die errors occur when a coin is struck more than once with misaligned dies, resulting in doubled images or text. These errors are highly sought after due to their distinct appearance and rarity, making them valuable to collectors.
Off-center strikes happen when the coin is not properly aligned with the dies during minting, causing parts of the design to be cut off. Collectors value these errors for their unique appearance and the limited number of examples available.
Incorrect die variations occur when a coin is struck with a die that has incorrect or unintended design elements. These errors are particularly desirable if they involve significant design changes or unique features not intended by the mint.
– Occasionally, state quarters are struck without certain inscriptions or text due to die defects or errors. Missing inscriptions, such as state names or mottos, are highly collectible because they are rare and represent a significant minting mistake.
Reverse errors occur when the reverse side of the coin features errors such as incorrect or incomplete designs. These errors can be sought after if they result in significant design changes or anomalies that are not commonly found.
Planchet errors happen when the blank metal disc (planchet) used to strike the coin is defective or irregular. Examples include coins with incorrect sizes or shapes, or those with foreign materials or contaminations.