You know what would solve this with a high degree of certainty is a small pool of comparison documents from the same period. It would give a very high-confidence probability indicator, and would not require a large sample pool to do so. WND claims it has such comparisons. Did they photograph/scan them? Where are they? Sans that, we need someone else to share a similar document from the same year. There are doubtless tens of thousands of such documents from 1964 floating around. All we need are a couple, copies even.
we’re on the same page then. I said the same thing you did in earlier posts asking for WND to produce images of pre-dec 12th 1964 docs with header & seal.