In his "Great Continental Railway Journeys" on BBC 2, he has just visited Biel/Bienne and tells us it is the centre of watchmaking. And who does he visit there to demonstrate? He goes to the Omega Museum and then is allowed onto the factory floor itself. If you can check it out on iPlayer (or the Internet method of your choice) it's worth a watch.

He even puts together a movement. Good luck if you have that one