Magnets and watches don’t mix, and many of us have had the experience of having a watch become suddenly inaccurate (or non-functioning), only to be later told by a watchmaker that it had become magnetized. As with all things invisible, the level of general understanding surrounding magnetism and watches is varied and mostly characterized by the fear of anything magnetizing your watch – be it the x-ray machine at the airport, your laptop at work, or even your own fridge. In an attempt to quell such concerns, Jack goes hands-on with a couple of very anti-magnetic watches and a seriously magnetic, well, magnet.