Dayum! I'd seen references to those maps in numerous WWII stories, and even in movies, but of course there was never any background on the origins. Thanks for letting us in on that.
I'm sure the Smithsonian would be interested. Even the apron would make an interesting display, with a slant of how everyone after the war was recycling war materiels, or the confidence the enemy had been thoroughly eliminated as a future threat, unlike after WWI.
I wonder if your Mom used that apron when entertaining, to start conversations highlighting Dad's achievements? Your earlier descriptions of them made it sound like they were very supportive of each other.