Die-deterioration Doubling
Die deterioration doubling (DDD) is an extremely common form of mint-made error on many United States and Canadian coins that results from degradation of the die used to strike the coin.
Due to a combination of improper preparation and treatment of the dies, excessive wear, and overuse, die deterioration doubling has occurred on nearly every series issued by the US mint in recent times. Certain coins are more susceptible to it than others, due to various factors, but it does occur on most series of coins.
Read more about Die-deterioration Doubling: Identification, Types of Die Deterioration Doubling, Numismatic Interest
Famous quotes containing the word doubling:
“My only objection to the arrangements there is the two-in-a-bed system. It is bad.... But let your words and conduct be perfectly pure—such as your mother might know without bringing a blush to your cheek.... If not already mentioned, do not tell your mother of the doubling in bed.”
—Rutherford Birchard Hayes (1822–1893)