Class IV : Offset Hub Doubling

Offset hub doubling occurs when the working hub is not centered exactly the same as a previous hubbing. Thus the die is hubbed with two different centers.

What to look for :

All the doubling will be in the same direction. The degree of doubling will be the same on design elements around the rim as in the center of the coin.

View these photomicrographs provided by Mr. Z
to help you understand Class IV.
And below these images you may go on to Class V.

This example is a 1983 Lincoln cent, Die 1.

1983 Lincoln cent graded MS 66 Red. The finest example of this doubled die we have ever seen. This coin in MS 66 Red is very hard to find.

On to Class V