IWC Schaffhausen Portugieser Perpetual Calendar

The IWC Portugieser Perpetual Calendar, reference IW503404, has a 44.2 mm case in 18-carat 5N gold. The watch has a perpetual calendar; the case has a thickness of 14.9 mm. The movement is self-winding and has a 168-hour power reserve and 54 jewels. The grey dial has a day and date display, small hacking seconds, a power reserve indicator and a moon phase display beneath arched-edge sapphire glass. A black alligator leather strap by Santoni is on the watch. A water-resistance rating of 30 metres applies to the case. Calibre 52615 operates at a frequency of 28,800 vibrations per hour.