IWC Schaffhausen Ingenieur Chronograph Silver Arrow

The IWC Ingenieur Chronograph Silver Arrow, reference IW378505, is a chronograph with a 45 mm steel case. A screw-down crown is set into the case, which measures 14.2 mm thick. The movement is self-winding and has a 68-hour power reserve and 38 jewels. The silver dial has a date display, small hacking seconds and a flyback function beneath convex sapphire glass. The watch is on a brown rubber strap. A water-resistance rating of 120 metres applies to the case. Calibre 89361 operates at a frequency of 28,800 vibrations per hour.