IWC Schaffhausen Ingenieur Constant-Force Tourbillon

The IWC Ingenieur Constant-Force Tourbillon, reference IW590002, has a 46 mm case in 18-carat 5N gold. The watch has a tourbillon with an integrated constant-force mechanism; at 13.9 mm thick, the case has a screw-down crown. Manual-winding calibre 94800 has a 96-hour power reserve, 43 jewels and 322 components. The black dial has small hacking seconds, a power reserve indicator and a moon phase display. A black rubber strap is on the watch. The case's water-resistance rating is 120 metres. A see-through case back displays the movement. The movement runs at 18,000 vibrations per hour.