Hm...don’t know. Perhaps it was an early designation of Cryptologist Technician or something? Never heard that one...but to be there at that point in history...that is really something!
You know the picture of the signing? The big one where it took in nearly the whole area? He pointed out where he was on the bridge as he watched it.
After it was all over, he said there was a drunken party to end all.