IWC Schaffhausen Portugieser Perpetual Calendar 44

The IWC Schaffhausen Portugieser Perpetual Calendar 44, reference IW503704, has a white gold case measuring 44.4 mm across. The case stands 15 mm thick, with a lug width of 22 mm, and carries a 50-metre water resistance rating. The self-winding IWC-manufactured calibre 52616 offers 168 hours of power reserve. The Dune dial sits under a sapphire crystal, while a sapphire crystal in the caseback reveals the movement. The perpetual calendar displays the date, day, month, four-digit year and moon phase, alongside a power reserve display and small seconds. IWC fits the watch with a black alligator leather strap made by Santoni.