Hi there.

All the new ones are. However I think IWC with the Ironring inside the case is resistant to alteast the same level as Rolex. But a strong maganitsm that will make the watch stop is not something 95 % of the people around the world gets exposeed to.

Only if you have a big loadspeaker and you let the watch touch the magnets, then the watch may stop. But are you just 2 cm. away from the spakers magnatismfield, nothing will happend.