The NEA stamp is a file date by that organization which was seperate from Acme, but linked in a sort of brother-sister relationship when this photo was issued. Sometimes the NEA stamp is the same day the photo is issued, other times NEA would receive a photo from 1921 and stamp it "NEA 1951" if that is when they received it into THEIR archives. So, rule of thumb is that it cant be any LATER than the NEA stamp, but it can be earlier by a day, a year, a decade etc. They are usually VERY close (especially in acme-Nea stuff since they were connected) but in rare occasions can be off so the NEA stamp is a good starting point. In this case, its safe to say this is a c. 1940 image and that gives you a year or two on either end. It is most likely a "type 2" but as was said before, it is impossible to tell unless I was holding the image and could look at it under magnification. It really doesn't matter too much, dont get hung up on the classification system. Just like the NEA stamps, its just a starting point in the process of enjoying a beautiful vintage photograph.
Rhys
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