That 1946 heading was there because it was the original information release.
I just got an e-mail from the guy who posted it. I asked the same question.
I am also getting more information about this from a German WWII Panzer historian. He is looking into it but there was not a lot published on this as most men would have thought it not news worthy....for those years...that is understandable. Waiting for a replay as we speak.
I can not find ONE thing more on her or Tank 069....but that does not mean it never happened.
Will keep all posted.