Quoting from this post by Stephen Wolfram:

And being reminded of this last week, I sent mail to his daughter to ask what had become of the box. Disappointingly, she responded that: “The Big Box opening turned out to be a Big Bust”. Apparently she and her children and their grandchildren had all assembled … only to discover that it was all a big mistake: the box was actually not John von Neumann’s at all!

A big disappointment indeed :(

]]>Thank you,

Tina Gabriel