IWC Schaffhausen Ingenieur Perpetual Calendar 41

The IWC Schaffhausen Ingenieur Perpetual Calendar 41, reference IW344904, has a titanium case and grey dial. A convex sapphire crystal with antireflective coating on both sides covers the dial. The self-winding IWC-manufactured calibre 82600 has 309 components and 46 jewels. Pellaton automatic winding is another movement feature. The glass is secured against displacement caused by a drop in air pressure. The perpetual calendar displays the date, weekday, month, leap year and moon phase. IWC describes this as the first titanium model to combine Gérald Genta-inspired Ingenieur design with Kurt Klaus's calendar complication. A titanium bracelet accompanies this reference.