We need closer pictures, you need to identify where you see the doubling on the others as well. It would also help if your pictures were a tad bit clearer, as I don't really see the doubling, something seems to be there but better pictures are needed to decide that.
Life is like a box of chocolates, you never know what your going to get - Forrest Gump
One of the best ways to see what a doubled die looks like is to check the sites like coppercoins, Variety Vista or Doubleddie.com . That way you can see what is listed and what is a doubled die for those years. Know what to look for, takes the guess would out of it. Ever wonder why there are no threads for subject you want to know more about? Most of the topics posted here are on a certain coin. Here is a link to many different subjects and what you are wanting to know with hundreds of pictures. http://goccf.com/t/265641&whichpage=2& If you don't want to look up this page another time, just remember this link. CoopHome : Note it is blue? Click on it and it will take you to search topic areas and it is also there.