IWC Schaffhausen Big Ingenieur Chronograph

The IWC Big Ingenieur Chronograph, reference IW378406, is a chronograph with a 45.7 mm steel case. The case is 14.7 mm thick; self-winding calibre 89361 has a 68-hour power reserve, 38 jewels and 299 components. The black dial has a date display and a flyback function. The watch is on a black alligator leather strap. 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. The dial is covered by convex sapphire glass with antireflective coating on both sides.