So I was mounting some of these covers into the album today, and I've taken to googling the senders and receivers to see if they were anyone of note.
In a previous post I'd mentioned that the sender of this postal card, Joseph Josselson of New York may have been an inventor.

I did find a web page of the National Museum Annual Report for the period ending June 30, 1963, and it seems a Mr Joseph Josselson of NYC did donate "11 miscellaneous U.S. and foreign philatelic covers" to the National Museum of the US. These would have ended up in the Philatelic collection in the Smithsonian.
On the reverse of the postal card, Mr. Josselson does acknowledge receiving several stamps from the addressee. I figure that and the FIFEX card is a pretty good indication that they are the same Mr. Josselson.
I think that's kind of cool.


Perhaps I should also point out that this card was postmark exactly one week before I was born!