IWC Schaffhausen Ingenieur Perpetual Calendar 41

The IWC Schaffhausen Ingenieur Perpetual Calendar 41, reference IW344903, has a stainless steel case measuring 41.6 mm across and 13.3 mm thick. The case carries a rating of 100 metres water resistance and is fitted with a screw-down crown. A self-winding calibre 82600, developed in-house, drives the watch and offers 60 hours of power reserve. The blue dial sits beneath a convex sapphire crystal with antireflective coating on both sides. The perpetual calendar displays the date, weekday, month, leap year and moon phase. A sapphire display back shows the movement. The watch is fitted with a stainless steel bracelet.