Errors and varieties are classified by three divisions to help define when and how they occur. Listed below are the three divisions. Choose which you think applies to your error or variety coin by clicking the link or image, or use the search feature. Also it is very important to learn the coin minting process before looking for mint errors so check out our guide Coin Minting Process
The Planchet Division errors happen when the alloy is being mixed and during and just after the creation of the planchet, but before the coin is struck by the working dies.
Rolled In Metal – Defective Planchet – Improper Alloy Mixture
Plating Issue – Split Planchet – Lamination
Clipped Planchet – Incomplete Clip – Blank (Type 1)
Unstruck Blank (Type 2) – Incorrect Planchet – Off Metal Planchets
Dual Denomination – Missing Clad Layer – Extra Metal – Improperly Annealed Planchet
Sintered Planchet – Burnishing Ball – Roller Marks
Unplated Planchet – Split Plating – Broken Planchet
Wrong Planchet and Off Metal – Wrong Stock Off Metal – Transitional Planchet Errors
The Die Division occurs during the creation of the die or during the use of the die as it breaks down and begins to crack apart.
Doubled Die – Die Crack – Die Breaks (CUDs)
Shattered Die – Die Gouge – Repunched Mint Mark (RPM)
Omitted Mint Mark – Trail Dies – Worn Die
Reengraved Die – Collar Die Break – Collar Die Clash
Transitional Reverses (Wide AM) – Misplaced Date MPD – Die Chips (BIE Varieties)
Muled Coin Designs – Motto Varieties
The Striking Division is mint errors that occur during the strike and can sometimes be dramatic.
Struck Through – Capped Die – Struck Through Capped Die
Multiple Strike – Bonded Multiple Strike – Brokage Strike
Uniface Strike – Collar Die Clash – Broad Strike
Edge Lettering – Die Clash – Die Adjustment
Misaligned Die (MAD) – Off Center Strike – Rotated Die
Strike Doubling – Struck On Feeder Finger – Collar Die Break
Uniface Strike – Dropped Letter
Miscellaneous: