IWC Schaffhausen Portugieser Perpetual Calendar 44

The IWC Schaffhausen Portugieser Perpetual Calendar 44, reference IW503701, has a 44.4 mm case in 18 ct Armor Gold. The case measures 15 mm thick, with a lug width of 22 mm. The case carries a 50 metre water resistance rating. A self-winding, IWC-manufactured calibre 52616 powers the watch, with 168 hours of power reserve. The dial sits under a sapphire crystal, and a sapphire display back shows the movement. The perpetual calendar shows date, day, month, year and moon phase, alongside a power reserve display and small seconds. A dark brown alligator leather strap by Santoni is fitted to the watch.