Posted By:
fkw If you look at the 2004 SCD, the M101-5 and M101-4 are now both listed as 1916. I made the change a few months back in my checklists/wantlists on my webpages when I read (on this message board) the Bob Lemke was going to list the sets this way after some research proved the 2 sets were from the same year (1916). If you go back a bit on this message board you will find the thread and it will show why they did this (I dont remember the exact reasons). 
Frank