IWC Schaffhausen Big Ingenieur Chronograph

The IWC Big Ingenieur Chronograph, reference IW378405, is a chronograph with a 45.7 mm steel case. The case is 14.7 mm thick; self-winding IWC-manufactured calibre 89361 has a 68-hour power reserve, 38 jewels and 299 components. The silver dial, covered by convex sapphire glass with antireflective coating on both sides, has a date display, small hacking seconds and a flyback function. The case's water-resistance rating is 120 metres. The movement has Côtes de Genève and perlage decoration. The movement runs at 28,800 vibrations per hour. A black alligator leather strap measures 16 mm wide.