I "see" the 0, but it can't be an overdate. If you compare the illusion on your coin to a 1940 date, you will see neither the position nor shape of the supposed 0 matches 1940. This is from PCGS price guide site:
This is the third thread you've opened asking the same question about this same coin. Good answers have already been posted in one of the others. Are you having trouble viewing the threads you've already started?