It has been floating around a long time. It is now on ebay again and i always wondered if it is real cause as the experts i here mentioned it looks a bit too good to be true. Slow and perfect. It is for sale on ebay right now and yes it once was sold at christie‘s. https://www.ebay.at/itm/164230244121
and it is also on that dutch beatles website for sale:
I've asked the seller. The seller and the website are the same people. So that's obviously cleared up. They said they will remove (ofcourse) the item from their website when its paid.