I just got some error coins back from PCGS, and I was admiring this one (bought it in 2014).

http://www.pcgs.com/cert/32839554

Then, I added to my PCGS Collectors Showcase set of nickel dollar errors and in the process of putting it in proper chronological order, I noticed that my other major strike through error was not only the same year, but almost identical (bought it in 2011).

http://www.pcgs.com/cert/26645608

There has to be a relationship between these two error strikes, the coincidence is far to unlikely to be random...