It can vary from strike to strike, circumstances as to what caused the looseness of the dies. Even the same set up can varry in the same run:

You can have it on just one device. You can have it on both sides of a device. Certain years can have a higher ratio of this happening. The rule is for
Machine Doubling;
There are no rules, just variables.
Edited by coop
11/28/2016 8:39 pm