Misplaced Dates (MPD's) are coins which have dates or digits of the date in area of the coin where it is not supposed to be. Misplaced Dates can be seen in the denticles of the coin as well as on some of the devices of the coin as well. It is unclear whether this variety was created, one theory being it was done as a hardness test if a misplaced date was toward the middle of the die or a gross error in aligning the date prior to punching the date onto the working die. Please add your comments or questions about Misplaced Dates within this forum.
Overdates on coins are created when the mint repurposes a working die from another year. They attempt to fill in the old year on the die. Then stamp a new single or double digit into this die. Overdate coins can be very dramatic and very noticeable or very close and subtle. This area is for questions and comments on coins with overdates.
Back in the day, Each die that was created had its date punched into the die by hand. They softened up the die and then utilizing a date punch and maybe a mallet attempted to strike the date into the new die. This process was far from perfect. Some times the punching of the date was insufficient and additional attempts to add good date was done. Re-punched dates can be either very dramatic in nature or very close and subtle. This area is open for discussions and questions about the Repunched date variety.
In the United States, Repunched Mintmarks (RPM's) existed until the 1990's. It was then that manual process of adding a mintmark to a working die ceased. Repunched Mintmarks are common amongst collectors. Feel free to post a comment or any questions related to RPM's within this forum
Over Mint Marks (OMM's) occur when the mint either repurposes a die or makes a mistake. The mint will eventually have two different mint marks on one working die. The process was to place one mint mark over the top of another. In some instances this was a D over an S, an S over a D, an O over a CC or other such combinations. Another subcategory here is the use of Double Mint Marks (DMM's). This occurred when two mint marks were added in different areas of the coin and no attempt was done to cover them up. In this forum please feel free to ask questions or post a comment on Over Mint Mark coins and Double Mint Mark coins.
Inverted Mint Marks (IMM's) occurred when a punch was used to add a mint mark into a working die, but that punch was held upside-down. The die was then added to a machine which created coins with the inverted mint mark. Please add your comments and questions about Inverted Mint Marks here.
Die Caps (also known as Capped Die) occur when a planchet is fed into the coin press. The previous planchet did not eject and the first planchet sticks to one of the coin dies. After repeated strikes, the first planchet starts taking the form of a bottle cap. Place your comments and questions in this forum area about die caps.
Broadstrike Errors happen when a coin is in below the dies in the striking chamber and the collar that holds the coin in place is not engaged properly. Since the metal is softened before striking, the coin press strikes the planchet without the collar in place resulting in unusual shapes. Post your questions and comments in this area that are related to broadstrikes.
Off Center error coins occur when a planchet that is struck by a coin press is not centered under the dies. The amount of off centering will vary. Off center coins that have the date apparent can bring a premium. Please post your questions and comments in this forum that are related to Off Center Error coins.
Double, Triple and Multiple stuck error coins occur when a recently stuck coin is unable to clear the striking chamber. The end result is that the coin may be struck two, three or multiple times. Most of the additional strikes had a good chance of being off center, resulting in a dramatic looking coin. Post your questions and comment in this forum that are related to Double, Triple or Multiple Struck Error Coins.
Double Denomination Errors occur when a coin is properly struck by a coin press. The coin then is inadvertently placed into the hopper of another denomination and also struck by that coin press as well. An example is a copper planchet is struck by a set of Lincoln Cent dies but somehow get struck by a coin press with dime dies as well. The end result is both denominations show on a single coin. Post your comments and questions about Double Denominations in this forum area.
Wrong Planchet Errors occur when a planchet is fed into a coin press which is not the correct for the dies that are installed. An example is a clad dime planchet being struck by a set of Lincoln Cent dies or a nickel planchet being fed into coin press which have Washington Quarter dies. Feel free to ask your questions and post your comments in this area that are related to Wrong Planchet errors.
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