As can be deduced from the name of this sub-category, an off-center strike occurs due to a horizontal misalignment of the planchet with respect to the position of the dies installed on the money press in operation. This happens when a planchet is fed into the press and falls into the spinner improperly. The product of an off-center strike is a coin that has an off-center imprint (E.B.4 and E.B.5).
Unlike a wide strike, off-center strike is characterized by design elements cut at the edge, although both errors in question always produce a totally smooth outline.
Coins with an off-center imprint may have degrees of cap deformation ranging from 10° to 90° (E.B.6 and E.B.7).
In many cases there is no obvious cause. In other cases, the non-minted part of the coin is pushed upwards by a rigid shell.
In any case, the percentage of the degree of horizontal misalignment of the planchet with respect to the position of the dies can vary from 10% (slightly off-center strike) to 99% (strongly off-center strike).
From 75% onwards they are designated as planchets minted on a lateral appendage instead of real coins (E.B.8 and E.B.9).