Dies subject to excessive pressure or that are worn will sometimes develop cracks. Cracks appear as raised irregular lines that can distort legends and other parts of the coin's design.  When a piece falls out of the die, coins struck from the damaged die show a raised lump or cud where the design is missing. Value depends on the size and placement of the die break or cud.

Type one flans have flat edges, type II flans have raised rims and are ready for the coinage press.

A coin with a fragment of metal missing or peeled off the coin's surface.  Caused by dirt or gas trapped in the strip as it is rolled out to the prescribed thickness. Lamination errors may be missing or attached to the coin's surface.  In the case of clad coins, the outer layer may be completely or partially missing on one or both sides.

Zinc cents with copper plating have been minted since the middle of  1982.  Sometimes the plating is partially or completely missing, resulting in cents with a silvery looking surface on part or all of the coin.

Broadstrikes are coins that were struck outside the retaining collar.  Without the collar the coins spread out and are larger than the normal pieces. If the coin normally has a reeded edge it will be missing from a broadstruck coin. Very wide and well centered pieces will bring much higher prices than the estimates below.