You raise even more questions, why would he even bother putting an address header on a memo to himself?
"why would he even bother putting an address header on a memo to himself?"
exactly;
a. either he would use a letterhead and follow the memo format for a Memordandum for Record;
b. or if it was something quick for his own use, why bother with formalities -- why anything but a date? why an odd signature block? Just write it, date it, initial or sign it.
If a unit clerk typed it, it would be case a.
If he did it himself, it would more likely be case a if he was a stickler about military formality; or case b if he just wanted a quick memo for himself. It would not be some mishmash in between.
Since he could not type (per his wife), it would have to be case a, a clerk typing it. A secretary or clerk WOULD use the letterhead and MFR format -- even if not perfectly (could be a new clerk or something).
But it violates too many conventions to have been case a.
Since he couldn't type (which we did not know for sure yest. before the widow spoke up) it wasn't case b, either.
"why would he even bother putting an address header on a memo to himself?"
That is a good question. I believe it would normally be entitled Memo for the Record but not necessarily on letterhead, if it were on letterhead it would be a pre-printed, not a typed, letterhead. Mrs PD