Putting "two and two together" I'm now certain that I've perpetuated a hoax! (aided and abetted by Google AI).
The still photos I presented in my earlier post are taken from this YouTube video . . .
. . . which I now note was published
four years ago!
The same person also published another video in the same year EXPLAINING HOW HE MADE IT . . .
So it looks like we'll need to wait to see what the factory-fresh one from Bachmann will actually look like.
Sorry for "setting this hare running".
All the best
David