Speaking of the in-junior series is characterized by a mechanical watch resistant to magnetism. Another piece of soft iron inner case is contained in the watch case and it has a structure that makes it harder for magnetic waves than ordinary watches. There are more cases that the case itself is thicker than the clocks of other IWC collections and the series of the in-junior itself has a large swing overall. But in modern series it is made more contemporary and sporty without damaging the appearance design.