IWC Schaffhausen Portugieser Perpetual Calendar Tourbillon

The IWC Schaffhausen Portugieser Perpetual Calendar Tourbillon IW504505 has a platinum case measuring 45 mm across. The case stands 15.2 mm thick, with a water resistance rating of 30 metres. An automatic, self-winding IWC-manufactured calibre 51950 drives the watch, offering a power reserve of 168 hours. The silver-plated dial sits under a sapphire crystal with an arched edge and antireflective coating on both sides. Complications include a perpetual calendar with moon phase and a flying tourbillon, along with a power reserve display. The case back is a display back, showing the movement. IWC fits this reference with a blue alligator leather strap by Santoni, fitted with a lug width of 22 mm.