IWC Schaffhausen Big Ingenieur Chronograph

The IWC Big Ingenieur Chronograph, reference IW378403, is a chronograph with a platinum case. Self-winding IWC-manufactured calibre 89360 has a power reserve of 68 hours and 40 jewels. The movement consists of 288 components and runs at a frequency of 28,800 vibrations per hour. The silver-plated dial has small hacking seconds, and the watch has a flyback function. The case carries a water-resistance rating of 120 metres. The watch is on a black alligator leather strap measuring 16 mm wide. Côtes de Genève and perlage are among the movement's finishes.