Class III : Design Hub Doubling
Design hub doubling occurs when at least two different master dies are used to make a working hub. Each having differences in the design features. Then for some reason, one of each working hub is used to make the working die. The difference in design will create the doubling on the working die.
What to look for :
Over dates are good examples of this type of doubling. The doubling is erratic and can be strong on one letter and have no doubling on the next letter. Doubling can be on any part of the design elements. The doubling will not follow the constant spread as in Class I or IV. It also will not have the gradual increase or decreases as in the doubling as in Class V.
The photo below is an uncirculated 1914 over 13 Buffalo nickel. Notice the white arrows toward the top of the four. You will see the top of a three under the four.