Hmm. I had long written this off. But now I’m not so sure—could this indeed be authentic? I’m not at present aware of what biblical or theological reasons would rule it out. If it is fraudulent, it would be a 2CV. But if it’s real, it is no less a violation of the ban on images than the Ark of the Covenant, or for that matter, the sacramental bread and wine.
If you have read more deeply on this question, historically and scientifically, and are convinced it is a fraud, leave a comment and share some references.
(Standard caveats. And I am a very, very orange-blooded Protestant, I assure you!)