Watchmaker Rebecca Struthers has been invited to come and examine a watch which its owners claim is the world's oldest - but is it?

Until now, Rebecca had only heard rumours of this watch - about the reputation of its famous maker, about the extraordinary circumstances in which it was found, about its unbelievable valuation. It is famous, or infamous, in antiquarian horology circles. But until Rebecca wrote her book 'Hands of Time' (a Radio 4 Book of the Week), few outside that small world had heard much about it.

Now, thanks to her book, a mysterious lawyer has emailed to ask if she'd like to examine the watch. So she's on her way to Switzerland with a lot of questions. Not least - is it the real deal or, as so many of the watch's detractors claim, nothing more than a forgery.

Producer: Giles Edwards