Some years ago I was investigating a fraudulent commercial bank in London. We came upon watch, apparently a Cartier. Needing to know if it was genuine, we took it to Cartier in Bond Street. Up the lift to the last plushy rooms, and then up the ‘rickety stairs’ to the attic where the expert had his work shop. He striped the watch into a ‘thousand pieces’ and spread them on his work table, spent quite a while checking this and that, and finally said, although he thought it was a fake, it was so good, that he would not be able to go to court and say it was not genuine.

So, if one can acquire a watch which the top experts cannot swear is a fake then that would seem to be a good reason for doing so.