The IWC Portugieser Perpetual Calendar (ref. IW503702) continues the brand’s legacy of mechanical ingenuity with a contemporary expression in Armor Gold and black. Debuted in 2024, it integrates IWC’s most celebrated complication into the refined profile of the Portugieser line, distinguished by its lustrous warm-toned case and classic dial symmetry.

Measuring 44mm in Armor Gold – IWC’s proprietary alloy with improved hardness and richer tone – the case frames a matte black dial with polished gold hands and appliqués. At the heart of the watch is the in-house calibre 52616. This self-winding movement features a seven-day (168-hour) power reserve and displays date, day, month, year, and moonphase, all coordinated through a single crown. The perpetual calendar is mechanically programmed until 2100, maintaining precision through decades of continuous use.

Marrying traditional complication watchmaking with enhanced materials and dependable autonomy, the ref. IW503702 serves as a modern benchmark within IWC’s high complication portfolio – appealing to collectors looking for both enduring utility and visual gravitas.